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Fox T-Bird/Cougar Forums

Technical => Drivetrain Tech => Topic started by: canadiancarguy on September 23, 2011, 08:42:36 AM

Title: Wondering if this is a good setup for a turbo setup
Post by: canadiancarguy on September 23, 2011, 08:42:36 AM
I have an 87 5.0 cougar that I ordered an on 3 turbo kit for. I bought a set of 3.73 gears for the rear with a posi carrier (stock limited slip unit). I also got a transgo shift kit and a 2600 stall converter. I know that for my 89 turbo t/a everyone recommended a 3500 stall with trans brake, but that made the car drive like a slug on the street. Just curious how does the 2600 feel for daily driving and if I should go for a higher stall converter to build more boost at the starting line.

I am also gonna change the rear shoes and axle bearings (or at least check em).
Title: Wondering if this is a good setup for a turbo setup
Post by: bigbada1 on September 23, 2011, 09:32:52 AM
Are you sitll running the SO if so you will end up melting the pistons fairly quickly as they are not cast
Title: Wondering if this is a good setup for a turbo setup
Post by: Shadow on September 23, 2011, 09:45:03 AM
your best bet is to find a 5.0 HO, if you don't already have 1.. i'd also recommend finding a set of GT40p heads if you're on a low budget after buying the kit and whatnot, do a little portwork and drop them on with some 3 layer performance 'metal' head gaskets with some ARP bolts or studs.. if you still have the stock SO 5.0 in your car, the heads have a very py flow rate and it won't be long before your pistons are toast
Title: Wondering if this is a good setup for a turbo setup
Post by: TOM Renzo on September 23, 2011, 01:27:15 PM
If BOO
Title: Wondering if this is a good setup for a turbo setup
Post by: canadiancarguy on September 23, 2011, 02:28:52 PM
I have another 302 that I just tore down, going to go with 331 forged stroker assembly. I have 85 HO heads that have been re-worked, or I might put my patriot aluminum heads on if I decide to go with AFR heads on my race car next year. I am pretty familiar with turbo and forced induction cars I think it'll be ok with 7psi of boost and the stock 9 to 1 compression ratio. The car will be dyno tuned once it is put together, I bought the complete package, so I got the oil filter relocation kit, walbro 255 fuel pump with hot wire kit, upgraded to 42 pound injectors with 76mm MAF sensor calibrated to those injectors. I will have to do a mass air conversion on the car as it is a speed density 5.0. Also I have a rough tune chip for initial startup and break in. This kit is designed to be able to grow into it, once the forged stroker is done and installed I will crank up the boost, but it will stay 7psi until it is ready for it.
Title: Wondering if this is a good setup for a turbo setup
Post by: The Shredder on September 23, 2011, 02:40:43 PM
Yeah.  Go for it.  7 psi should be fine.  As long as you keep the engine cool. 

Then, when you have the 331 ready, turn up the boost to 20psi! :)  Then take a picture of the carnage!
Title: Wondering if this is a good setup for a turbo setup
Post by: Shadow on September 23, 2011, 02:44:43 PM
Quote from: TOM Renzo;368218
If BOOST it is going to be substantial i would run Forged Slugs.

I may be wrong on this but i think starting in '87, all S.O. short blocks were the same as the '86 H.O. motors.. Early motors 86-87 had forged slugs. Not 100% on this because i have seen many engines not hold true to this. I really dont know the cutoff from Forged to Cast. But i think it was 88. Ford says the HO is a forged piston engine. Once again i am not 100% on this because i have seen differences over the model years. Either way Forged pistons should be used on a turbo motor for high boost. Hope this helps thank you

NOTE this is from memory and if i am wrong i apologize.


all (original) SO motors i have had my hands into have had the py, flat tops with no valve reliefs(ford's standard, non-cast junk pistons). that's why an SO motor isn't capable of running as large of a cam as a stock HO motor can handle, because the cast HO pistons have valve reliefs




Quote from: canadiancarguy;368223
I have another 302 that I just tore down, going to go with 331 forged stroker assembly. I have 85 HO heads that have been re-worked, or I might put my patriot aluminum heads on if I decide to go with AFR heads on my race car next year. I am pretty familiar with turbo and forced induction cars I think it'll be ok with 7psi of boost and the stock 9 to 1 compression ratio. The car will be dyno tuned once it is put together, I bought the complete package, so I got the oil filter relocation kit, walbro 255 fuel pump with hot wire kit, upgraded to 42 pound injectors with 76mm MAF sensor calibrated to those injectors. I will have to do a mass air conversion on the car as it is a speed density 5.0. Also I have a rough tune chip for initial startup and break in. This kit is designed to be able to grow into it, once the forged stroker is done and installed I will crank up the boost, but it will stay 7psi until it is ready for it.

7-8psi is plenty safe with 9:1 compression, as long as the pistons are at least cast. the compression in my 408 is 8:1 and i'm pushing around 14psi on the street and roughly 16-18psi at the track, depending on conditions
Title: Wondering if this is a good setup for a turbo setup
Post by: canadiancarguy on September 23, 2011, 03:13:10 PM
I am not even gonna bother changing the cam or intake on the car, I will put it all on the other long block.

Shadow

Are you running a 351 windsor based 408? Also what size turbo are you running?
Title: Wondering if this is a good setup for a turbo setup
Post by: Shadow on September 23, 2011, 03:34:39 PM
yep, but it's a DART block. originally, i had a 58mm garrett on it.. about 2 months ago i found a STEAL on a 72mm precision, so i upgraded.. doesn't spool as quickly, but overall it gives me a much better combo
Title: Wondering if this is a good setup for a turbo setup
Post by: canadiancarguy on September 23, 2011, 04:15:52 PM
I have a 302 based dart block in my drag car. They are nice pieces that's for sure. I would like to upgrade to a 460 small block one of these days....
Title: Wondering if this is a good setup for a turbo setup
Post by: Shadow on September 23, 2011, 05:07:13 PM
jesus and jiminy crickets a 460 small block? good god almighty
Title: Wondering if this is a good setup for a turbo setup
Post by: TOM Renzo on September 25, 2011, 11:01:06 AM
Found this on a ford website.

They are a true flat top with no valve reliefs, and are most certainly forged. They have TRW stamped under the crown. I believe the cast pistons from that year still had valve reliefs.

I was not sure if they were forged but some engines i did were. According to this guy he also says flat tops were forged. I was not 100% on this and still may be wrong. But this guy did confirm they were forged with no eyebrows. Thanks

It has been a long time since i have dun a factory 302. Most of the smaller engines we do are strokers and forged. Hope this helps
Title: Wondering if this is a good setup for a turbo setup
Post by: canadiancarguy on September 25, 2011, 12:51:16 PM
I have never seen a factory set of forged pistons on a 302 yet, but  this is the first base model 302 I have ever owned, so not used to seeing such little head ports. Here is another dumb question does anyone make a lower fuel injected 5.0 manifold for cleveland heads?
Title: Wondering if this is a good setup for a turbo setup
Post by: Shadow on September 25, 2011, 02:21:04 PM
no intake.. BUT, price motorsports sells intake adapters to bolt a windsor style intake to the boss heads.. sounds like someone's building a clevor lol


http://www.pricemotorsport.com/
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