Twin Turbo - equal or unequal headers?

2FastLX · 11-30-2002, 11:19 AM

I've been asking people on turbo message boards if it makes a difference if you use equal or unequal headers on a twin turbo setup. So far they have all been telling me it won't make a bit of difference. I find that a little hard to believe. Any thoughts?

Cody2552 · 11-30-2002, 03:14 PM

I have researched the Twin turbo package, and every package comes with its own headers b/c of the turbo. They are for heat produced i guess.

Dark_5.0 · 11-30-2002, 03:16 PM

I thought on a TT car you would have 2 turbo manifolds

2FastLX · 11-30-2002, 03:21 PM

Yeah you do.

fiveohpatrol · 11-30-2002, 03:53 PM

hey Kevin, I wouldn't think that it would be that big of a difference between the two.

Do you still have the MAC longtubes from your old setup? I need some for my new GT40P combo.

We could make somewhat of a trade+cash for my BBK unequal shorties if you were interested.

shoot me an email, see ya

2FastLX · 11-30-2002, 05:00 PM

I've been sending you emails. What email are you using now? My old email address isn't working any more. Use webmaster@mustangwarehouse.com or axemanzz@abcs.com

The guy that was supposed to be buying my exhaust says he isn't going to have the cash and that I should come and get it and try to sell to someone else, so if you want to do some swapping I'm game.

fiveohpatrol · 11-30-2002, 06:13 PM

still using drew.lyons@rose-hulman.edu

I've gotten a few emails from ya, so its still workin

If you ever visit the corral, go to the engine tech forum and find my post about ported GT40P heads and check out the port work that Tim did for me. My eventual goal is to go 11's NA with P heads. I know it will be tough, so thats why I'm wanting some longtubes, just to get me one step closer.

I MAY sell the nitrous kit to get a HAL k-member, but not sure yet.
I think I'm gonna spray it just once at IRP when spring hits, just to say I've gone 11's before, and also to get them to kick me out for not having a cage

BilLster · 12-01-2002, 12:40 AM

its like this if you have unequal length shorties dont spend the money buying equal or if your like me im having a set of custom made headers equal leangth with the colector at the turbo.

2FastLX · 12-01-2002, 01:36 AM

I have a set of Canfield heads and have yet to find a set of headers cheap enough to want to buy them and cut them up for turbo manifolds. But I do have a set of custom made header flanges made to line up exactly with the ports of these heads. I think it would be a waste not to use these nicely made flanges so I'm thinking I am going to build the headers myself.

I was just wondering if it would be worth it to add all the extra bends it would take to make equal length headers. I had 3 senior guys from a turbo message board tell me it won't make a difference at all with a turbo application. I find that hard to believe because it does with an N/A application. I don't understand how a turbo would change that.

Anyone know?

CB93LX · 12-01-2002, 10:57 AM

Im planning on using equals on my upcoming twin turbo set up. Only prob. i see is its gonna be tight getting to those spark plugs and maybe hood clearence.

BilLster · 12-01-2002, 10:59 AM

i was running stock headers with a extension and bought a set of equal length shorties and peak hp didnt improve but torque and hp were up over the curve untill the lifters gave out.

when i put the new motor together we put in solid roller lifter and
let a friend experiment with headrs on the dyno.

what he came up with was a equal lenght header full size from a dragster with the collector cut where the turbo flange neede to be

low end boost increased dramatically and witht he lifters hp was up to 712 but it was the improvement all over the curve that impresed us both (even with the solid lifters tq and hp increased when the custom headers were installed) problem is they wont fit
in the car without some rerouting so he's building me a custom set for $300.00 bones)

my old ones were like these i borrowed the picture from my favorite turbo site. toohighpsi.

BilLster · 12-01-2002, 11:01 AM

sorry tried to attach a pic but need to learn how to do these things properly

2FastLX · 12-01-2002, 11:09 AM

So you are saying that you dynoed a turbo car with equal and unequal length headers and gained hp when you switched to equals? Just want to clarify this for a few people.

BilLster · 12-01-2002, 03:31 PM

max hp and tq remained the same but it was up all over the graph

max hp was reached like 750 rpm sooner tq like 1000 rpm

that was between the equal and unequal after that we installed solid rollers and tested between equal length headers and come custom pipes he had in the shop. hp an tq were the same but reached sooner

we should of really done a boost graph as i believe boost was reached sooner.

so for max hp it doesnt matter that much but throught the curve there was a difference.

11-30-2002, 11:19 AM	#1
2FastLX The Photoshop Guru Join Date: Feb 2001 Location: Mecca, Indiana Posts: 1,419	Twin Turbo - equal or unequal headers? I've been asking people on turbo message boards if it makes a difference if you use equal or unequal headers on a twin turbo setup. So far they have all been telling me it won't make a bit of difference. I find that a little hard to believe. Any thoughts? __________________ Project: 1988 Coupe - EFI 5.8L Twin Turbo with Victor intake, Canfield heads, F303 cam, March aluminum underdrive pulleys, TKO (or T56 if funds permit), PBR twin piston calipers and 13" rotors up front, 94 Cobra rear calipers and 12" rotors on the rear, 3.73's, Griggs K-member, tubular front control arms, torque arm and panhard bar, polished 99 Cobra wheels. "The GR-40 kit installation is now complete, and the humble Fox-chassis car will now out-corner and out-stop a ZR-1 or a Viper, and support massive horsepower additions with perfect balance." Griggs Racing ICQ# 42269241

11-30-2002, 03:16 PM	#3
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	I thought on a TT car you would have 2 turbo manifolds __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

11-30-2002, 03:21 PM	#4
2FastLX The Photoshop Guru Join Date: Feb 2001 Location: Mecca, Indiana Posts: 1,419	Yeah you do. __________________ Project: 1988 Coupe - EFI 5.8L Twin Turbo with Victor intake, Canfield heads, F303 cam, March aluminum underdrive pulleys, TKO (or T56 if funds permit), PBR twin piston calipers and 13" rotors up front, 94 Cobra rear calipers and 12" rotors on the rear, 3.73's, Griggs K-member, tubular front control arms, torque arm and panhard bar, polished 99 Cobra wheels. "The GR-40 kit installation is now complete, and the humble Fox-chassis car will now out-corner and out-stop a ZR-1 or a Viper, and support massive horsepower additions with perfect balance." Griggs Racing ICQ# 42269241

11-30-2002, 03:53 PM	#5
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	hey Kevin, I wouldn't think that it would be that big of a difference between the two. Do you still have the MAC longtubes from your old setup? I need some for my new GT40P combo. We could make somewhat of a trade+cash for my BBK unequal shorties if you were interested. shoot me an email, see ya __________________ NMRA O/C 9516 NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft

11-30-2002, 05:00 PM	#6
2FastLX The Photoshop Guru Join Date: Feb 2001 Location: Mecca, Indiana Posts: 1,419	I've been sending you emails. What email are you using now? My old email address isn't working any more. Use webmaster@mustangwarehouse.com or axemanzz@abcs.com The guy that was supposed to be buying my exhaust says he isn't going to have the cash and that I should come and get it and try to sell to someone else, so if you want to do some swapping I'm game. __________________ Project: 1988 Coupe - EFI 5.8L Twin Turbo with Victor intake, Canfield heads, F303 cam, March aluminum underdrive pulleys, TKO (or T56 if funds permit), PBR twin piston calipers and 13" rotors up front, 94 Cobra rear calipers and 12" rotors on the rear, 3.73's, Griggs K-member, tubular front control arms, torque arm and panhard bar, polished 99 Cobra wheels. "The GR-40 kit installation is now complete, and the humble Fox-chassis car will now out-corner and out-stop a ZR-1 or a Viper, and support massive horsepower additions with perfect balance." Griggs Racing ICQ# 42269241

11-30-2002, 03:14 PM	#2
Cody2552 Registered Member Join Date: Nov 2002 Posts: 68	I have researched the Twin turbo package, and every package comes with its own headers b/c of the turbo. They are for heat produced i guess.

11-30-2002, 06:13 PM	#7
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	still using drew.lyons@rose-hulman.edu I've gotten a few emails from ya, so its still workin If you ever visit the corral, go to the engine tech forum and find my post about ported GT40P heads and check out the port work that Tim did for me. My eventual goal is to go 11's NA with P heads. I know it will be tough, so thats why I'm wanting some longtubes, just to get me one step closer. I MAY sell the nitrous kit to get a HAL k-member, but not sure yet. I think I'm gonna spray it just once at IRP when spring hits, just to say I've gone 11's before, and also to get them to kick me out for not having a cage __________________ NMRA O/C 9516 NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft

12-01-2002, 12:40 AM	#8
BilLster Registered Member Join Date: Oct 2000 Location: Ontario canada Posts: 446	its like this if you have unequal length shorties dont spend the money buying equal or if your like me im having a set of custom made headers equal leangth with the colector at the turbo. __________________ 89 with 331 t3'/t4 hybrids. upr Suspention worked out finnaly . 9.89 144 mph .

12-01-2002, 01:36 AM	#9
2FastLX The Photoshop Guru Join Date: Feb 2001 Location: Mecca, Indiana Posts: 1,419	I have a set of Canfield heads and have yet to find a set of headers cheap enough to want to buy them and cut them up for turbo manifolds. But I do have a set of custom made header flanges made to line up exactly with the ports of these heads. I think it would be a waste not to use these nicely made flanges so I'm thinking I am going to build the headers myself. I was just wondering if it would be worth it to add all the extra bends it would take to make equal length headers. I had 3 senior guys from a turbo message board tell me it won't make a difference at all with a turbo application. I find that hard to believe because it does with an N/A application. I don't understand how a turbo would change that. Anyone know? __________________ Project: 1988 Coupe - EFI 5.8L Twin Turbo with Victor intake, Canfield heads, F303 cam, March aluminum underdrive pulleys, TKO (or T56 if funds permit), PBR twin piston calipers and 13" rotors up front, 94 Cobra rear calipers and 12" rotors on the rear, 3.73's, Griggs K-member, tubular front control arms, torque arm and panhard bar, polished 99 Cobra wheels. "The GR-40 kit installation is now complete, and the humble Fox-chassis car will now out-corner and out-stop a ZR-1 or a Viper, and support massive horsepower additions with perfect balance." Griggs Racing ICQ# 42269241

12-01-2002, 10:57 AM	#10
CB93LX Registered Member Join Date: Oct 2002 Location: Eastern N.C. Posts: 50	Im planning on using equals on my upcoming twin turbo set up. Only prob. i see is its gonna be tight getting to those spark plugs and maybe hood clearence.

12-01-2002, 10:59 AM	#11
BilLster Registered Member Join Date: Oct 2000 Location: Ontario canada Posts: 446	i was running stock headers with a extension and bought a set of equal length shorties and peak hp didnt improve but torque and hp were up over the curve untill the lifters gave out. when i put the new motor together we put in solid roller lifter and let a friend experiment with headrs on the dyno. what he came up with was a equal lenght header full size from a dragster with the collector cut where the turbo flange neede to be low end boost increased dramatically and witht he lifters hp was up to 712 but it was the improvement all over the curve that impresed us both (even with the solid lifters tq and hp increased when the custom headers were installed) problem is they wont fit in the car without some rerouting so he's building me a custom set for $300.00 bones) my old ones were like these i borrowed the picture from my favorite turbo site. toohighpsi. __________________ 89 with 331 t3'/t4 hybrids. upr Suspention worked out finnaly . 9.89 144 mph .

12-01-2002, 11:09 AM	#13
2FastLX The Photoshop Guru Join Date: Feb 2001 Location: Mecca, Indiana Posts: 1,419	So you are saying that you dynoed a turbo car with equal and unequal length headers and gained hp when you switched to equals? Just want to clarify this for a few people. __________________ Project: 1988 Coupe - EFI 5.8L Twin Turbo with Victor intake, Canfield heads, F303 cam, March aluminum underdrive pulleys, TKO (or T56 if funds permit), PBR twin piston calipers and 13" rotors up front, 94 Cobra rear calipers and 12" rotors on the rear, 3.73's, Griggs K-member, tubular front control arms, torque arm and panhard bar, polished 99 Cobra wheels. "The GR-40 kit installation is now complete, and the humble Fox-chassis car will now out-corner and out-stop a ZR-1 or a Viper, and support massive horsepower additions with perfect balance." Griggs Racing ICQ# 42269241 Last edited by 2FastLX; 12-01-2002 at 11:16 AM..

12-01-2002, 03:31 PM	#14
BilLster Registered Member Join Date: Oct 2000 Location: Ontario canada Posts: 446	max hp and tq remained the same but it was up all over the graph max hp was reached like 750 rpm sooner tq like 1000 rpm that was between the equal and unequal after that we installed solid rollers and tested between equal length headers and come custom pipes he had in the shop. hp an tq were the same but reached sooner we should of really done a boost graph as i believe boost was reached sooner. so for max hp it doesnt matter that much but throught the curve there was a difference. __________________ 89 with 331 t3'/t4 hybrids. upr Suspention worked out finnaly . 9.89 144 mph .

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