Mating a 1999 3800 SC to a 90 700r4
Borrowed an adapter to copy and found i instructions on the internet that say to elongate exsisting bolt holes. But that seems to require grinding into the ring gear.
Looking for whatever info insight or suggestions.
Was thinking a*60 V6 flexplate from a 700r4 s10 or 4l60 3800 Camaro may work?
Before the flexplate, how are you going to manage the tv cable geometry? Without that being set properly and having the right geometry, a 700r4 is a hand grenade with the pin pulled.
I was planning to use the original bracket for the cable and set it at the same distance from the throttle as it was in the corvette.
Then I was planning to take it to a corvette guy who does carb conversions to have it checked.
How about finding a trans from a 3.1 camaro and put the vette tail housing on it? They should be basically free at this point
In reply to Patrick :
500+ rwtq would likely blow a used stock trans on the first pass.
if you can make an l67 put 500 torques to the wheels i’ll buy you a beer.
I think v8 archie makes a 60* to v8 bellhousing adapter for fieros, so the pattern is out there
try looking up 3800 camaro flywheel on rock auto, sometimes they have dimensions
Crazier said:In reply to Patrick :
500+ rwtq would likely blow a used stock trans on the first pass.
Two things- I've had a 700r4 behind a supercharged 350 that will run 13.50's, and it would be much quicker if it would hook. Its been there for 15 years or so, unbroken. Second, 500 foot pounds out of a 3800sc is pretty darn optimistic.
Belhousing is covered.
Its the torque converter to belhousing bolts that are the trouble.
A 4l60 from a camaro may be my only option now, but that would severely set me back.
You will need a flexplate for the 3800, not a 60 degree V6, balance is quite different. Since you are running EFI with the 3800, seems like a 4L60e would be the easier choice. Edit, removed info.
Crazier said:Belhousing is covered.
Its the torque converter to belhousing bolts that are the trouble.
A 4l60 from a camaro may be my only option now, but that would severely set me back.
Converter to flywheel pattern too big? I *think* you can get a v6 s10 converter for a 2.8 that has smaller pattern that will likely stall in the high 2000’s behind actual power.
In reply to Streetwiseguy :
Yeah, my goal is 450 hp.
Gen5 SC. S1x cam. 1.8 yella terra rockers. Ported heads. Nstar TB Ls4 maf. Ls7 lifters. 105 lb springs. ZZP FSIC and FMHE. 80lb injectors. Belt wrap. Exaust cut out. Camaro headers. running on E85 with a 2.6 pulley total lift of 576 in 592 ex.
Id be plenty happy at 400 rwhp but may run a small shot later. I may be overly optimistic, but I don't think im way off.
One thing, the 3800 has a bit unusual torque convertor pilot. Here is the one I had a while back, from a '99 Camaro. Also, does your 700 have the starter pocket on the drivers side?
In reply to Patrick :
Is the old s10 torque converter 27 spline or 30? Thats one of the questions tripping me up.
In reply to 81cpcamaro :
I was windering about that. The 2.8 to th350 adapter we are copying has a spacer there.
Crazier said:In reply to Patrick :
Is the old s10 torque converter 27 spline or 30? Thats one of the questions tripping me up.
I think by 88 all 700r4 went to 30, so an 89+ 2.8 camaro or s10 converter should fit your input shaft. Verify before spending money though.
In reply to 81cpcamaro :
If that 4l60 has a 30 spline converter it could swap into the 700 and solve my problems other than converter lock up...I may just have to go without.
Thanks guys. I have this engine ready to drop in. Thought I had it all figured out but when I did the "test" flexplate i couldn't slot the holes out far enough without grinding the ring... Made me a little upset.
Patrick said:How about finding a trans from a 3.1 camaro and put the vette tail housing on it? They should be basically free at this point
No. 3.1 Camaro has the starter pocket on the wrong side. So does the 3.4 Camaro. Chevy put the crappy RWD-based 60-degree engines in the F-bodies for some damn reason.
Need a trans from either a 3800 F-body or a 2.2l S-10. Those all had left-side starter pockets. GM never made RWD 3800s or 2.2s, so they made 700R4s/4L60s to mate up with the FWD version of the "Metric" bolt pattern instead.
Starter fits into the inspection cover area on the wrong with just a little clearencing. And some cutting of the cover.
I just need a 30 spline 10 inch convertet with 9.8 inch bolt spacing with that extendec pilot or that i can use the pilot spacer on. That fits in a 700r4.
Most of the 4l60 converters ive found seem to be 27 spline.
In reply to Crazier :
You could probably buy an entire 3800 Camaro for what a swap converter would cost.
i know almost nothing about this but, could you just weld on new "holes" for the bolts? or would it be impossible to balance?
Ive been given a trans out of a 97 fbody. Car is headed to the scrapper, I just have to go pull it.
Unknown mileage but ran when crashed.
A (probably) high mile 4l60 is probably not going to last long behind this monster... But its what I have.
Maybe later i can get a swap converter or build up a 4l65, but for the moment this will get the project going again.
Thanks for the help.
Ok. So everything was going good until... Trying to figure out if there is any way my 3800 computer will read the vss from the corvette style worm gear driven (mechanical?) Vss. Or if they ever made a magnetic reluctor style VSs beg enough to fit in the large 700r4 vss spot? Or an adapter?
GRM rule #347.
If you don't see a certain swap/collection of parts very often, or never, there's probably a very good reason why.
4l60 in a c4 is fairly common actually. What is not common is a $2019 budget that makes it a little harder...
Rather than buy $300 to $500 in aftermarket swap parts I am just trying to find a more GRM solution.
Adapter id need is about $250 but thats most of the budget I have left.
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