4 bolt mains

chevette_boy · 04-05-2008, 09:50 PM

Hello! im wondering if there is any interest in a 4 bolt main caps for #2 and 3 journals. I will be designing a set for myself with the related drill jig for a rwd block, im sure the caps will work on the fwd blocks as well. they will be a 4130 material and hopfully enable 6-700hp. I am currently running a twin turbo 3200 hybrid in my chevette, im making 387hp and 483lbft @ 10psi and 413hp and 539 lbft @ 15 psi at the crank and i am starting to stretch the 2&3 caps and take out the bearings. im gonna be building a 3500 hybrid off a 3.4 this year and hope to make 500hp & 600lbft (4 and 500 wheel respectively).
heres the car:
dyno:
http://www.youtube.com/watch?v=CGKYJJ1Iurc
12.97@109 mph car will do 112mph still working on getting the power down.
http://www.youtube.com/watch?v=iPnjs...eature=related

**SappySE107** · 04-05-2008, 10:11 PM

Im not sure the oil pan on the 3400 allows for the 4 bolt main setup. I could be wrong but its crossbolted to the pan unlike the stamped steel pans.

Superdave · 04-05-2008, 10:23 PM

i've seen your videos before, nice setup!

yah, the FWD gen3 blocks have crossbolted mains.. i haven't heard of anyone having bearing issues related to power output with those.. still a good idea for the older blocks though.

chevette_boy · 04-06-2008, 12:26 AM

Quote:

Originally Posted by SappySE107

Im not sure the oil pan on the 3400 allows for the 4 bolt main setup. I could be wrong but its crossbolted to the pan unlike the stamped steel pans.

yea the caps would be for the rwd 2.8,3.1,3.4 and fwd 2.8,3.1. i heard of some ppl using ford caps before...any one hear know what caps may have been used

betterthanyou · 04-06-2008, 02:04 AM

GM has 4 bolt caps on the aluminum Bowtie block. Maybe the caps are available separate or perhaps you could source a similar setup. Or a splayed small block cap might be able too be machined to work.

chevette_boy · 04-06-2008, 01:58 PM

Quote:

Originally Posted by betterthanyou

GM has 4 bolt caps on the aluminum Bowtie block. Maybe the caps are available separate or perhaps you could source a similar setup. Or a splayed small block cap might be able too be machined to work.

the caps and block are discontinued and i have yet to find a cap that can be made to work

betterthanyou · 04-06-2008, 02:24 PM

Well a SBC has smaller mains so a shop would have to machine the caps. But the bolt holes and stuff may pose a problem.

Ortie666 · 04-08-2008, 03:16 AM

yeah, Im in.. Ill buy a set if the outer bolt holes were splayed a bit

chevette_boy · 04-08-2008, 06:51 PM

Quote:

Originally Posted by Ortie666

yeah, Im in.. Ill buy a set if the outer bolt holes were splayed a bit

yea the holes will be splayed and positioned as per gm's blueprints. ill work on a price once i get a working set. Nice to see another chevette owner using the 6-60* its nice and light and very powerful

ForcedFirebird · 04-08-2008, 07:08 PM

I'm interested in the outcome.

Since my next motor is going to be a big-power twin turbo, I need all the help I can get since I want to see what a 3.1/3400 can really do.

You could save yourself some dough by using a 3x00 block. The 3x00 block is actually stronger. A local has split a 3.4 block down the valley in a 300+hp N/A sprint car (I sold him a 3500 block

) running 14:1 SCR and a 6000rpm max.

Nice job on the car, BTW.

500-600 is also my goal as well, trying for 250whp N/A first.

What compression/turbos/fuel are you using?