Summit 306 Kit ?????

cop-coupe · 01-27-2001, 12:47 PM

Its time to rebuild my worn out short block and dont want to spend a but load an a D.S.S. short block so my thought is that I would rebuild myself using the Summit 306 Kit it comes w/ a cast Ford Racing crank, and Keith Black Hypereutectic pistons.
Q#1 will this crank be adequate for a under 100 hp. n.o.s. or low psi supercharger.
Q#2 wich pistons are better forged or hyper I have heard positive opinions on both.
also if you have any other opinions on other less exp. short block kits please let me know. just for info this would just be a street car with occasonal track time.

------------------
1990 spec. serv. coupe w/aod, b-303, gt-40 heads and intake, 1.6rr, 1" spacer, fms valve covers, mac cold air intake, bbk equil shorties, under drives, 65mm t.b. 2.5" flows, fms 9mm wires,

90dpscoupe · 01-27-2001, 03:45 PM

I kinda had the same question, i want a new block, but i want to keep forged pistons instead of hypernematic's.

o and i think it would be fine with nos.

------------------
90 lx coupe: Mac cold air fenderwell, accel supercoil,advncd ignition,3-core radiatr, FMS alum D/S, Black magic fan, 3.27grs, 3chbr flows.
Best time: 14.1623(on 225/60/15 firehawks)
Best mph: 97.80
Best 60': 2.0728
next mods: subframes, 3.73's

Mont · 01-27-2001, 09:10 PM

Forged pistons are better for a blower or nos...

------------------
89 LX Supercharged DSS 357, 11 lbs Powerdyne, Downs Box intake, ported GT-40x heads, lockwired, Crane Cam 1.6 rockers, Crower cam, Oil cooler, Moroso oil evac kit, Taylor 10mm wires, MAC 70mm T/B, 30lb injectors, Vortech fuel rails, Pro M 75mm Mass air, Vortech T-Rex Fuel pump, 255lph intank pump, K&N, Cobra R radiator MSD6-BTM, Lakewood bellhousing, Tremec Trans, Pro 5.0 shifter, MAC headers and X-pipe, Dynomax race mufflers. Dyno at 556hp to the wheels.

silver_pilate · 01-27-2001, 10:06 PM

I agree; forged pistons are better for nitrous or boost.

That's not to say that hypereutectics won't hold up if set up right. Look what Lidio did with that stock 4.6 and a turbo....wasn't he in the 9's when the motor chunked? And wasn't it the rod that broke before the piston?

Hypereutectics are good because they are light weight and have less thermal expansion that forged pistons. Therfore you can run them to tighter tolerances. However, they can't take the same types of beatings that forged pistons can.

Bottom line...if you're going to go hyper, get a mechanic who has worked with the Keith Blacks before. Piston ring gap is critical when setting up hypereutectic pistons for different applications. If you set up the rings for N/A and run nitrous or a blower, you will blow the ring lands right off the pistons. Also, hypers do not hold up well to detonation. Make sure your car is in good tune so you don't pit the piston.

--nathan

------------------
--silver_pilate

'91 GT, Built 306, Wolverine 1087 cam, ported Windsor Jr. Irons, and all the goodies...click the link to the left to see a full list of my mods...

Tried and True 302 Being Built to Outrun You! heh heh heh...
--Texas Panhandle--
Check out my site

[This message has been edited by silver_pilate (edited 01-27-2001).]

LX XLR8R · 01-27-2001, 10:39 PM

hyper is good but forged is alot more forgiving..forged will resist predetination and a lean condition alot better..hyper will shatter

------------------
1987 black notch(ex 4 banger)
DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one..

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01-27-2001, 12:47 PM	#1
cop-coupe Registered Member Join Date: Apr 1999 Location: belleville IL. Posts: 60	Summit 306 Kit ????? Its time to rebuild my worn out short block and dont want to spend a but load an a D.S.S. short block so my thought is that I would rebuild myself using the Summit 306 Kit it comes w/ a cast Ford Racing crank, and Keith Black Hypereutectic pistons. Q#1 will this crank be adequate for a under 100 hp. n.o.s. or low psi supercharger. Q#2 wich pistons are better forged or hyper I have heard positive opinions on both. also if you have any other opinions on other less exp. short block kits please let me know. just for info this would just be a street car with occasonal track time. ------------------ 1990 spec. serv. coupe w/aod, b-303, gt-40 heads and intake, 1.6rr, 1" spacer, fms valve covers, mac cold air intake, bbk equil shorties, under drives, 65mm t.b. 2.5" flows, fms 9mm wires,

01-27-2001, 03:45 PM	#2
90dpscoupe Registered Member Join Date: Jun 2000 Location: sanantonio, Tx, usa Posts: 1,407	I kinda had the same question, i want a new block, but i want to keep forged pistons instead of hypernematic's. o and i think it would be fine with nos. ------------------ 90 lx coupe: Mac cold air fenderwell, accel supercoil,advncd ignition,3-core radiatr, FMS alum D/S, Black magic fan, 3.27grs, 3chbr flows. Best time: 14.1623(on 225/60/15 firehawks) Best mph: 97.80 Best 60': 2.0728 next mods: subframes, 3.73's

01-27-2001, 09:10 PM	#3
Mont Registered Member Join Date: Aug 2000 Location: Bountiful, UT Posts: 91	Forged pistons are better for a blower or nos... ------------------ 89 LX Supercharged DSS 357, 11 lbs Powerdyne, Downs Box intake, ported GT-40x heads, lockwired, Crane Cam 1.6 rockers, Crower cam, Oil cooler, Moroso oil evac kit, Taylor 10mm wires, MAC 70mm T/B, 30lb injectors, Vortech fuel rails, Pro M 75mm Mass air, Vortech T-Rex Fuel pump, 255lph intank pump, K&N, Cobra R radiator MSD6-BTM, Lakewood bellhousing, Tremec Trans, Pro 5.0 shifter, MAC headers and X-pipe, Dynomax race mufflers. Dyno at 556hp to the wheels.

01-27-2001, 10:06 PM	#4
silver_pilate DURKA DURKA!! Join Date: Sep 1997 Location: Lubbock, TX...(TX panhandle) Posts: 1,418	I agree; forged pistons are better for nitrous or boost. That's not to say that hypereutectics won't hold up if set up right. Look what Lidio did with that stock 4.6 and a turbo....wasn't he in the 9's when the motor chunked? And wasn't it the rod that broke before the piston? Hypereutectics are good because they are light weight and have less thermal expansion that forged pistons. Therfore you can run them to tighter tolerances. However, they can't take the same types of beatings that forged pistons can. Bottom line...if you're going to go hyper, get a mechanic who has worked with the Keith Blacks before. Piston ring gap is critical when setting up hypereutectic pistons for different applications. If you set up the rings for N/A and run nitrous or a blower, you will blow the ring lands right off the pistons. Also, hypers do not hold up well to detonation. Make sure your car is in good tune so you don't pit the piston. --nathan ------------------ --silver_pilate '91 GT, Built 306, Wolverine 1087 cam, ported Windsor Jr. Irons, and all the goodies...click the link to the left to see a full list of my mods... Tried and True 302 Being Built to Outrun You! heh heh heh... --Texas Panhandle-- Check out my site [This message has been edited by silver_pilate (edited 01-27-2001).]

01-27-2001, 10:39 PM	#5
LX XLR8R Dirk Diggler Join Date: Feb 1999 Location: SLOATSBURG, NY Posts: 1,931	hyper is good but forged is alot more forgiving..forged will resist predetination and a lean condition alot better..hyper will shatter ------------------ 1987 black notch(ex 4 banger) DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one..