Turbocharged400sbc
Automotive
- Apr 20, 2014
- 5
i have learned a few things from here over the years, probably a little out of left field but here it goes. (primary question in bold)
some of you may remember Hurst built several exhibition cars, one of these was the 66/67 twin drivetrain Hurst "Hairy" Olds 442 "4-4-too much"
using two 500+ hp blown 425 olds v8's and the "new" toronado transaxle, it lived up to its name
the obvious suspension alignment/deformation issues led to it wrecking twice and being retired...Toronado stuff hardly being sturdy enough....we do not wish for the same fate
we have been building a 94 cutlass coupe with two 3800 supercharged FWD drivetrains...after 10 years of working with it we are getting ready to unleash two 500+hp powerplants in it and we are redoing the chassis to handle it.
right now we have 4 corner mcpherson (two front suspension work pretty well) but one thing is clear...both drivetrains want to flip this heap onto its back...so we are ending up with a front powerplant thats good at destroying tires and useless off the line.
on the 500fwhp 2000 turbo regal, i have to dial 2* of toe in for us to end up near 0* while under power... so we are going to heim...this car got me thinking about keeping the 442 from killing us...the TR embodies all that is tq steer that'll make you let loose a few drops...and we are looking at two of em in one car...
im looking at an IRS take on the classic IC adjustable drag racing suspension but using 6 links per custom knuckle (plus a sway link so 6.5 lol)
we are dealing with 4,000+lbs and some wide rear rubber...yes we would like to have fun with "on demand" over/understeer around a track. so this thing is going to be sturdy.
while im no slouch im not "schooled" been building racecars for a while...mostly oddball shit (im putting a turbo buick driveline into an 84 cressida WaGN)
i am a hack, there i said it. from what i can figure a std tube chassis with a dropout rear suspension/drivetrain cradle is the primary plan. front is stuck with a coilover converted OEM type McPherson "narrowed" to move the knuckles in a little with the new front LCA/cradle.
the rear im planning on 4 equal length laterals with the drag racing 4 link setup as our radius bar. for drag i can figure equal length lats would be fine...but im guessing anything more is the classic compromise...drag vs handling
yes the layout for the knuckle looks scary...but should give us plenty of adjustment so we can make changes over the years of sorting it out lol
am i missing something with us setting the rear IC to hit so the front is forced down and the rear to lift to directly counter the front drivetrain trying to lift the front and push the rear down....
ive done pretty good with the Tq steer issue...the 4t80e transaxles have equal length female spline shafts so the flex difference is the same.
within the next year we should be up and driving with our current hacked chassis and front suspensions...if the two previous motors are any indication we are going to find this thing is quite a handfull for now we are looking at a coilover sleeve on the rear with some really stiff springs to crutch it along for now...but id love some feedback/idea/reference/reading suggestions.
as you can figure there's not much ive found for twin drivetrain issues... welcome to the headache lol
Regards, James W.
some of you may remember Hurst built several exhibition cars, one of these was the 66/67 twin drivetrain Hurst "Hairy" Olds 442 "4-4-too much"
using two 500+ hp blown 425 olds v8's and the "new" toronado transaxle, it lived up to its name
the obvious suspension alignment/deformation issues led to it wrecking twice and being retired...Toronado stuff hardly being sturdy enough....we do not wish for the same fate
we have been building a 94 cutlass coupe with two 3800 supercharged FWD drivetrains...after 10 years of working with it we are getting ready to unleash two 500+hp powerplants in it and we are redoing the chassis to handle it.
right now we have 4 corner mcpherson (two front suspension work pretty well) but one thing is clear...both drivetrains want to flip this heap onto its back...so we are ending up with a front powerplant thats good at destroying tires and useless off the line.
on the 500fwhp 2000 turbo regal, i have to dial 2* of toe in for us to end up near 0* while under power... so we are going to heim...this car got me thinking about keeping the 442 from killing us...the TR embodies all that is tq steer that'll make you let loose a few drops...and we are looking at two of em in one car...
im looking at an IRS take on the classic IC adjustable drag racing suspension but using 6 links per custom knuckle (plus a sway link so 6.5 lol)
we are dealing with 4,000+lbs and some wide rear rubber...yes we would like to have fun with "on demand" over/understeer around a track. so this thing is going to be sturdy.
while im no slouch im not "schooled" been building racecars for a while...mostly oddball shit (im putting a turbo buick driveline into an 84 cressida WaGN)
i am a hack, there i said it. from what i can figure a std tube chassis with a dropout rear suspension/drivetrain cradle is the primary plan. front is stuck with a coilover converted OEM type McPherson "narrowed" to move the knuckles in a little with the new front LCA/cradle.
the rear im planning on 4 equal length laterals with the drag racing 4 link setup as our radius bar. for drag i can figure equal length lats would be fine...but im guessing anything more is the classic compromise...drag vs handling
yes the layout for the knuckle looks scary...but should give us plenty of adjustment so we can make changes over the years of sorting it out lol
am i missing something with us setting the rear IC to hit so the front is forced down and the rear to lift to directly counter the front drivetrain trying to lift the front and push the rear down....
ive done pretty good with the Tq steer issue...the 4t80e transaxles have equal length female spline shafts so the flex difference is the same.
within the next year we should be up and driving with our current hacked chassis and front suspensions...if the two previous motors are any indication we are going to find this thing is quite a handfull for now we are looking at a coilover sleeve on the rear with some really stiff springs to crutch it along for now...but id love some feedback/idea/reference/reading suggestions.
as you can figure there's not much ive found for twin drivetrain issues... welcome to the headache lol
Regards, James W.
