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  Topic: Winter Race Car Projects
MikeJinCO

Replies: 8
Views: 109

PostForum: Performance Upgrades   Posted: Sun Jan 17, 2021 5:57 am   Subject: Winter Race Car Projects
We have vintage racing that are supposedly built to old specs. Mine are the 1981 SCCA Dp which was really pro racing at the time. Some of the cars are built to 1972 and others to 1965 standards, we ...
  Topic: Winter Race Car Projects
MikeJinCO

Replies: 8
Views: 109

PostForum: Performance Upgrades   Posted: Sun Jan 17, 2021 3:37 am   Subject: Winter Race Car Projects
I'll get JE with somewhere around 11.5+- compression. When I talked to EBS Racing they said "Oh, I remember getting those pistons' so I'll go that way. This is not a low budget motor, I alrea ...
  Topic: Winter Race Car Projects
MikeJinCO

Replies: 8
Views: 109

PostForum: Performance Upgrades   Posted: Sun Jan 17, 2021 2:14 am   Subject: Winter Race Car Projects
A log of upgrade projects for the race car.

First I'm starting on building a new motor using the 941 head in a NA application. I bought a cam from the Netherlands, CatCam. It is a 294 duration,24 ...
  Topic: CV axles, splined bolt size.
MikeJinCO

Replies: 1
Views: 172

PostForum: General Discussions   Posted: Thu Jan 14, 2021 12:05 am   Subject: CV axles, splined bolt size.
The triple square bolts are a standard 8x1.25x50 bolt. For some reason they are a gr 8.8 which when torqued supposedly stretch(it is actually at about 80% of the yield point). I use standard grade 1 ...
  Topic: 1 stud build
MikeJinCO

Replies: 79
Views: 20219

PostForum: Performance Upgrades   Posted: Tue Jan 12, 2021 7:44 am   Subject: 1 stud build
GAZ suspensions are meant to be used as helpers. If removing the torsion bars you need a holder for the spring plate. The only ones I've seen are from Lindsey or Elephant racing and quite expensive. ...
  Topic: Prep for 2021
MikeJinCO

Replies: 11
Views: 369

PostForum: 924 Racing Today   Posted: Sat Jan 09, 2021 1:27 pm   Subject: Prep for 2021
I would put good poly bushing in the front suspension, To make the delrin front bushing work I had to enlarge the holes in the front cross member in order to set the caster. Ruins the cross member fo ...
  Topic: What's the horsepower difference between US and Euro spec
MikeJinCO

Replies: 22
Views: 572

PostForum: Performance Upgrades   Posted: Sat Jan 09, 2021 1:10 pm   Subject: What's the horsepower difference between US and Euro spec
The 77.5 model got bigger intake valves, 40mm vs 38mm, a higher compression ratio from 8.5 vs 8.0 and a slightly different camshaft with more duration. They also changed the torsion bar spring plates ...
  Topic: 931 chamber question
MikeJinCO

Replies: 4
Views: 218

PostForum: Performance Upgrades   Posted: Thu Jan 07, 2021 10:52 am   Subject: 931 chamber question
You're a much braver man the I.

I have read of piston experiments to find the minimizing top ring land thickness for pollution control purposes. If you could find some pistons that clear the dec ...
  Topic: 931 chamber question
MikeJinCO

Replies: 4
Views: 218

PostForum: Performance Upgrades   Posted: Thu Jan 07, 2021 5:49 am   Subject: 931 chamber question
I'm taking my ported 931 head to the machinist in a couple of days. I didn't enlarge the combustion chamber at all, just polished with a cross buff. I my opinion the only valve shrouding is on the cy ...
  Topic: WTB: NA Alternator Mounts
MikeJinCO

Replies: 2
Views: 219

PostForum: Cars and Parts Wanted/For Sale   Posted: Tue Jan 05, 2021 12:39 am   Subject: WTB: NA Alternator Mounts
Thanks, I found in my stash a back mount(to block) that is cast aluminum, rather than a bent steel bracket, at some point they changed and apparently the front changed at the same time. I'd prefer t ...
  Topic: WTB: NA Alternator Mounts
MikeJinCO

Replies: 2
Views: 219

PostForum: Cars and Parts Wanted/For Sale   Posted: Sun Jan 03, 2021 2:38 pm   Subject: WTB: NA Alternator Mounts
Looking for the alternator mounts for a NA. The bracket that bolts to the block is #046 903 143A and the front offset bracket that bolts to the water pump is #046 903 145A.
  Topic: Lots of 931 Parts for Sale
MikeJinCO

Replies: 3
Views: 464

PostForum: Cars and Parts Wanted/For Sale   Posted: Fri Jan 01, 2021 3:02 am   Subject: Lots of 931 Parts for Sale
I would like the oil pickup. PM sent
  Topic: 16v head swap? lets work it out!
MikeJinCO

Replies: 60
Views: 29567

PostForum: Performance Upgrades   Posted: Tue Dec 15, 2020 12:31 am   Subject: 16v head swap? lets work it out!
Congratulations, a true marvel of engineering.
  Topic: Transplanting 924 turbo engine on na
MikeJinCO

Replies: 56
Views: 2605

PostForum: Performance Upgrades   Posted: Sun Dec 13, 2020 4:23 am   Subject: Transplanting 924 turbo engine on na
I have been porting and flow testing a 931 head. With the NA head unless some really serious porting(a la Gegge) is done the flow tends to stall at .400 lift. On the 931 head the flow continues to c ...
  Topic: Puzzler....... for you to help me solve.......SOLVED!!!
MikeJinCO

Replies: 14
Views: 1582

PostForum: General Discussions   Posted: Wed Dec 02, 2020 11:08 am   Subject: Puzzler....... for you to help me solve.......SOLVED!!!
First clean the grounds as Paul said. The cable connection ends have been know to get internal corrosion which you can't see, both positive and ground leads. Try running a booster cable jumper from ...
 
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