Valve Springs for Trick Flow stage 2 cam

[Coupe Devil]

Looking to get a Stage 2 Trick flow cam.

Here are the specs:


**Posted wrong specs... look below for correct specs.**

Now, going to be running a set of ported Gt-40 irons, Long tube headers. ported Weiand stealth Intake and 650 D.P. Carb. Not sure what info you need to help me.. I just need a good set of quality springs. Im comfortable with Crane. Comp and Lunati.. any others im open to suggetsions.

Thanks
Bradley

[james87gt]

what kind of pistons are you running and are they notched

[Coupe Devil]

.030 over Forged 97-93 pistons

Oh and sorry those are the wrong specs above..

Here are hte right ones

Specifications:
* Advertised duration: 286 intake/294 exhaust
* Duration at .050 in. lift: 224 intake/232 exhaust
* Gross lift: .542 in. intake/.563 in. exhaust
* Lobe separation: 112 degrees
* RPM range: 2,500 to 6,000

Thanks
Bradley

[Murdock]

Here are the spec's for the TFS Stage 2: (Use the valve spring TFS specifies at the bottom) You will need to flycut the pistons.

TFS-51402001

Valve Setting Intake: .000 in.
Valve Setting Exhaust: .000 in.
Advertised Duration (Degrees): 286 intake/294 exhaust
Duration at .050 in. Lift (Degrees): 224 intake/232 exhaust
Camshaft Lift: .339 in. intake/.352 in. exhaust
Valve Lift with 1.6 Rocker Arms: .542 in. intake/.563 in. exhaust
Lobe Separation (Degrees): 112
Intake Cam Timing at .050 in. Valve Lift:
Opens 5 degrees BTDC
Closes 39 degrees ABDC
Max lift: 107 degrees ATDC
Exhaust Cam Timing at .050 in. Valve Lift:
Opens 53 degrees BBDC
Closes 1 degrees BTDC
Max lift: 117 degrees BTDC
Firing Order: 1-3-7-2-6-5-4-8
Camshaft Notes: Fair idle, good midrange power. Aftermarket intake, heads, headers, and modified Mass Airflow sensor required. 2,500-3,500 rpm stall converter or 5-speed with 3.55 in. or higher rear axle gear recommended. Best with 9.5:1-11:1 compression ratio.

Recommended Components: TFS-51402001
Valve Springs with 1.6 Rocker Arms: TFS-31400414
Valve Springs with 1.7 Rocker Arms: TFS-31400414

[Coupe Devil]

Thanks for that info man.. My rear gear, tranny and compression fit right in with that cam I hadnt seen a spec list that long for this cam so now I know I'm good to go.. As far as fly cutting the pistons.. The pistons are still in the motor.. guess it'll be with the ole hand grinder.. I dont know how to degree a cam or do all the measuring for vavle clearance but the giuy whos shop I use does.. Thank goodness What rockers do you recommend?? 1.6's or 1.7's I will be looking for a used set to start with..

Thanks again
Bradley

[Murdock]

I would stick with the 1.6 rocker ratio with that cam. The extra lift the 1.7's will give wont help much because you'll probably be flowing to your GT-40 full potential with a .542 lift anywise. Has the short block already been done?

Murdock

[Coupe Devil]

So you think that the trick Flow stage 1 with a set of 1.6 rockers is what to go with... What about Valve sizing? Should I keep these stock or swap in bigger valves. I am going to drill the heads and use studs instead of pedestal mount rockers though..And the short block is already done. Taking it out of the race car..

Bradley

[Murdock]

Ok...Bradley your getting me confused man Are you wanting the Stage 1 or 2? Your valve size is 1.94/1.60's in the GT-40's I believe. I wouldn't change the size, your only feeding at most a 4.030x3.000 hole. You will be fine. I have built cars that are in the 11.5 second range with this cam. Not bad at all for an off the shelf camshaft.

Murdock

[Coupe Devil]

Originally posted by Murdock
Ok...Bradley your getting me confused man Are you wanting the Stage 1 or 2? Your valve size is 1.94/1.60's in the GT-40's I believe. I wouldn't change the size, your only feeding at most a 4.030x3.000 hole. You will be fine. I have built cars that are in the 11.5 second range with this cam. Not bad at all for an off the shelf camshaft.

Murdock

Im not sure what cam I want. I can get either cam, I want the cam that will suit me best. (obviously) I just dont know which that is. Most people have told me to run the Stage 1 with ported heads and 1.6 rockers. And if the valve sizing upgrade is going to not help me.. ( the more I think about it I realize it wont )I just wont do that. I will invest in some good stainless valves. I think I can get a set for about $80 bucks.

Bradley

[86GT]

I've got a Stage 2, and the springs you need are fairly strong. TFS has a kit, valve springs, seals, shims, locks, retainers, valve height gauge. This is part number 2500200 and from summit. Its expensive, but worth it. I have 1.90 valves and had to notch the pistons some more for clearance.

[Coupe Devil]

Thanks for that info 86 gt. Do you have 86 style pistons or 87-93 dished? With the option to get either of the cams.. I need to get he stage 1 ( from a buddy) and jsut check the clearances.. then look at the numbers of the stage two and see which I can use. I think I could do that..

Bradley