Need some tech help on turbo sb

[majik16106]

Hey guys, not for the z project but i figure'd this would b the place to ask since most of ya'll know more about this than other places. Im looking at building a twin turbo small block for a pro-touring car im going to start building after the first of the year. Im new to the whole old school v8 thing, IE im not used to picking out cams and such. I think i may just use the banks set up or build something almost identicle as far as the turbo's are concerned, a big t3, or smaller t3/t4s nice spool, good power. I know i wanna go full forged internals, probably try for like an 8.5 to 1 or little less on the compression side, and i wanted to lenghthen the stroke a little with say a .030 over pistion, make a 366 or something near that. I'll do all the port work and head work, getting some good valve springs and such. anyway.. i was hoping maybe someone could just give me a good basic small block turbo set up, say 600-700 hp, just so i can see about what im working with as far as cam durations, head clearances, springs and valves.. etc. id like a motor that can do 7k if possible.

[Mikelly]

I have a connection for some new design turbo exhaust manifolds for the SBC that I can provide offline if you are interested...

 

They are being manufactured by the employee of a well known internal motor parts company... this is a side venture and he has some serious backing, and years of experience with Turbo SBC applications...

Mike 8)

[Owen]

Sounds like you have a pretty good idea already of what needs to be done! Forged parts, low compression, turbo sizes...as for a cam, I'd go with a really mild one, maybe a little bit more than stock. For the turbos you'd probably want a .60AR on the hot side. I hope the tranny/diff can hold up to that power!

 

T3/T4s didn't come stock in anything did they?

Owen

[majik16106]

I mean im knowlegeable on how to build engines, i know the theory, im lacking the experience. But as einstein said , " a real genious is a person who knows what they do not know.." and why i may not be a genious, i know a lot is said for experience i want all the help i can get, dont wanna be 6g's into an engine and find out somethings wrong, something i could have avoided if i had taken 5 min to post on this site. Mike.. i will definatly get with you, id love to talk to this guy. I can fabricate manifolds, or know a guy who can, my only concern is the induction at the throttle body/carb.. although im going to use fuel injection. As far as the tranny is concerned, ill probably use the new Temec Tko600, i want that .64 overdrive, with the tires i plan on running and a nice 3.73 rear end, ill be doing 70 mph at 2100rpm. Thats some gas mileage. I think my big concern is using the stroker crankshaft with a small bore (by comparison to what people usually match it to) and then building a head and cam and trying to spin it to 7000, i want this thing to be a good mid-topend car. Im used to supras guys, thats a highway car, 5.0 mustangs and even ls1 powered cars in my opinion cannot pull up top like a supra does. Im not saying this sbc has to pull like that, but i dont want something dying off at 5400rpm. i want it to pull hard to 6800-7000. its become apparent to me though, that a .60 twin set up with a t3/t4 should actually yeild somewhere near 750hp with a good intercooler and tuning. plenty for me. this car is a little heavier than the z, probably around 2850 when all said and done i would guess.. dont mind it though, i like bigger heavier cars, the z was a step in an odd direction for me.