Forum: C4 ZR-1 Technical Postings
1 Day Ago
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Replies: 5
Views: 252
Re: 90 stalling issue solved
Basically opening the throttle blades, ie allowing more air at idle. Is your car modified or stock ? Do you have any data logs of the stall condition? If so, what are the IAC counts at a warm idle?...
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Forum: C4 ZR-1 Technical Postings
2 Days Ago
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Replies: 5
Views: 252
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Forum: C4 ZR-1 General Postings
04-28-2024
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Replies: 6
Views: 4,272
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Forum: C4 ZR-1 General Postings
04-27-2024
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Replies: 6
Views: 4,272
Re: Dyno rip of 1994 #150
Just an FYI. I would say the car detonated around 25-26 seconds on run 1 and around 17-18 seconds on run 2.
Graham
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Forum: C4 ZR-1 Technical Postings
04-24-2024
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Replies: 12
Views: 6,619
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Forum: C4 ZR-1 Technical Postings
03-08-2024
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Replies: 3
Views: 3,021
Re: AIR System questions?
The purpose of Air injection is to speed up catalyst light off ie get them up to working temperature. Since you have watson headers, do you have cats? When we designed these headers the retention of...
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
03-02-2024
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Replies: 10
Views: 2,914
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
03-02-2024
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Replies: 10
Views: 2,914
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
03-01-2024
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Replies: 10
Views: 2,914
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
03-01-2024
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Replies: 10
Views: 2,914
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Forum: C4 ZR-1 Technical Postings
10-23-2023
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Replies: 6
Views: 1,798
Re: Engine knock
Its probably too large a file. If you recordwd it on a cell phone sendbit as a text to 260-701-8860.
Graham
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Forum: C4 ZR-1 Technical Postings
10-23-2023
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Replies: 6
Views: 1,798
Re: Engine knock
If you have a 700 r4 trans, you do not have a dual mass flywheel, just a flex plate, unless someone did something very creative. The chain tensioner makes more of a "clatter" and is normally present...
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Forum: C4 ZR-1 Technical Postings
09-09-2023
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Replies: 12
Views: 4,938
Re: Limits of stock LT5 with boost?
Now we have resolved the cam quantity.
A conservative turbo system nets roughly 3-4% power increase over base engine power level per pound of boost. So Jerrys performance estimate is pretty close....
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Forum: C4 ZR-1 Technical Postings
10-29-2022
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Replies: 9
Views: 2,185
Re: Crankshaft cup plugs
Phil has a correct answer. The only things i would add, when replacing stock plugs the kent moore tool is correct, when fitting aftermarket plugs it may not be depending on plug width. Also stock is...
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Forum: C4 ZR-1 Technical Postings
09-18-2022
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Replies: 26
Views: 5,439
Re: 0W40?
Hib, there comes that "Beacon".
Graham
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Forum: C4 ZR-1 General Postings
08-31-2022
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Replies: 11
Views: 1,751
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Forum: C4 ZR-1 General Postings
08-30-2022
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Replies: 11
Views: 1,751
Re: Prototype Piston Award Signatures?
Thanks for showing pictures of the later piston Bob.
If you compare the earlier piston pics, you will see the subtle change in the piston casting to better support the expansion insert towards the...
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Forum: C4 ZR-1 General Postings
08-29-2022
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Replies: 11
Views: 1,751
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
05-16-2022
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Replies: 1
Views: 511
94-95 Black interior componets wanted
Hi all, basically I am looking for all interior trim components and hardware. Looking to change a gray interior to black. I have carpets and seats, but all other color specific components plus.
Pm...
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Forum: C4 ZR-1 General Postings
03-07-2022
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Replies: 102
Views: 104,383
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Forum: C4 ZR-1 General Postings
01-18-2022
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Replies: 5
Views: 1,162
Re: Lotus GT1 used the LT5?!
The story is somewhat true, but lotus already had a twin turbo v8 and the FIA regulations on air restrictors were prohibitive. So the LT5 was used in a flat plane crank 6.0
naturally aspirated...
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
12-29-2021
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Replies: 0
Views: 551
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Forum: C4 ZR-1 General Postings
09-06-2021
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Replies: 38
Views: 4,509
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Forum: C4 ZR-1 General Postings
08-13-2021
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Replies: 38
Views: 4,509
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Forum: C4 ZR-1 General Postings
08-13-2021
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Replies: 38
Views: 4,509
Re: Was a ZR-1 Ever Tested at 180mph?
The Facebook page may be a better place to ask this.
The reason I say this is that I recall a test at DPG, desert proving grounds, that was a v max test for the cooling system. I have seen DPG and...
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