B18CYA

iTrader: (17)

Wondering if any of you out there have seen this combo or know of someone with a T6 flanged S series turbo, truck mani kit, full 4" DP and a 370 with ported LS1 heads and LS6 intake. Considering 408 since this is going to be a pump gas setup and will not see over 14-15 psi very often.

Grr

iTrader: (2)

well i am running a stock 6.0 with cam only, running about 11.2:1 AFR, cause i am non- IC'ed at the time. long headers and a stock 1900 stall, i see full boost (9-10psi) in first gear leaving off idle at about 4400. Plan on wrapping the headers and crossover this winter, should bring it down to the 4000 area. Turbo is a off the shelf S74, 1.32 T6 exhaust, full 4" exhaust out the back through mufflers. although i have pushed through the converter and saw 5psi at around 2800 before on the footbrake. I think i can get it down a couple hundred rpm more by messing with the tune, i havent even tried that yet.

DrTurbo

iTrader: (3)

An S80 is a awesome turbo and will spool and make great power. On a 370 you should have no problems getting it spooled with a 370, but a 408 will definitely get the turbo lite well before a 370. The 80mm comp will feed a 408 no problem at 15psi.

Speed

iTrader: (33)

Not an S80 but not a 370 either, I see full spool on my stock engine/T76 below 2400 on a 4th gear roll on. If your kit is free flowing and your turbo well suited, you can get some pretty damn quick spool times.

B18CYA

iTrader: (17)

Yikes your scaring the **** out of me. I was thinkin more like 3600-3800. Is your turbo just a of the shelf borg warner unit or a forced inductions S series? I believe my S80 is a 1.1 ar also.

I would like to stay 370 for the fact of cost and it being a little better on gas but dont know if full boost by 4000-4400 is going to cut it.

Thanks for the replies guys keepem coming

hellbents10

iTrader: (10)

With a 350 and a 78 I was making a a full 6psi on the footbrake at 4000rpm. In the higher gears it came on sooner. With a 12 psi spring I am sure it would have came on sooner yet.

B18CYA

iTrader: (17)

I also plan on running a th400 and gears around 3.00. I might as well just build a 408 make huge power with out worrying about lifting heads

black98ws6ta

iTrader: (77)

If you arent going to run more then 15 psi and it is a more street set-up I would think the 408 will suit you more. Better off idle/low rpm power and torque, will spool fast, and still make the numbers. If you were looking to make huge power the 370 would be a better choice, I would think.

Grr

iTrader: (2)

yeah its just a standard borg warner. also my times arent optimised at all at this time. Once i get the I/C on and better tuning in the lower kPa ranges i expect full boost round 3800-4000. with your ported heads you should do quite a bit better than me as well.
Also i wouldn't be worried about the high spool anyway, these turbos make SO much power up top, look at the times in my sig, thats on a BONE STOCK everything, converter, trans, engine, with cam only and a turbo. on pump gas with no intercooler too! 3750lb raceweight. A 3600 stall converter will drop me into the mid 10's, without any motor work.
Gary

NA$TY-TA

iTrader: (21)

I was full spool by 4-4200 with my 370ci motor and an S88..... 20 psi...
Glide and 3.54's out back.....

B18CYA

iTrader: (17)

thanks for the replies guys. I think the 408 is more suited for my intended use.

wickedwarlock

iTrader: (4)

Dr Turbo, I was considering a T76 on a 370ci motor but now pondering just going to a larger motor (402 or 408) with an s80.

I have an sts kit. I should be able to do the s80 on that correct? I know the T76 isn't any problem.

I was looking for only 800whp originally but for a few bucks more from a 370 to 40xci motor is peanuts at that point. Same goes for a t76 and a s80. Prices can't be too much different and giving my the availability to have more power.

Sorry to Hi-jack the thread, but I'd be asking a similar question, and no need since it's roughly the same topic.

DrTurbo

iTrader: (3)

Hmmm only 800rwhp with a rear mount....lol. That is not an easy thing to acomplish. Yeah the S80 would do it, but you will have to swap to a T6 flange and 5" DP.

wickedwarlock

iTrader: (4)

Ouch, more work, rofl. Maybe I will just stick with the T76 on a 370ci. I've been doing some research. Seems 700whp is pretty easy on a rear mount. T76 and a 370, i've been told by a few places wouldn't be any problems at 12psi pump gas. I'm running 11.5:1 a/f ratio and car put down 400/400 on a mustang dyno 8.5psi. i've seen mustang dynos in the past. But this one is the toughest I've seen yet, rofl. Another guys car put 440 down on his 408 at one mustang dyno shop, comes there and it's only a 380, rofl.

I'm extremely happy with the kit, I think it all depends on what shop is doing the work. That rear mount turbo lag for me is a myth at least. I guess time will tell. I've heard good things about the s80, just don't really want to do much changing in piping but won't have any choice I see.

NA$TY-TA

iTrader: (21)

If your going to go with a 400+ cube motor.... dont go any smaller then an 88mm Turbo......
With a 370 a S80 would be Fun.... and S88 would be even more
Ask Me how i know


Kyle

DrTurbo

iTrader: (3)

With a rear mount though, I think it would still be tough to spool. Front mount I say no doubt about it.

wickedwarlock

iTrader: (4)

I've talked to you before about your motor nasty. Indeed! The choices seem endless.

wickedwarlock

iTrader: (4)

Yeap, I'm not sure how an S88 would do on a rear mount.

Never seems to be enough power.

NA$TY-TA

iTrader: (21)

Yeah just saw that after i posted.....

Grr

iTrader: (2)

i decided to put in some timing yesterday, took it up to 18 degrees and added about 8-10 degrees here and there. more like a stock high octane map. Then i cut the boost back to 8.5 psi. car is making 5hp more now than it was at 13psi at the track last weekend, on 89 octane to boot! Also it dropped my spool up down to about 4100rpm, thats a 300 rpm gain and its definately noticable. I run a 10.5" drag radial and it would just haze em at the top of first and pretty good into 2nd for about 60 feet. after it lights em up hard in first and will destroy 2nd up to about 90mph, its freakin wild. Now if i only had that intercooler on there i could run 12psi on 89 octane, next year will be fun.
Gary