Just dynoed car after porting heads, Inj will not go above 7.34ms??
Just dynoed car after porting heads, Inj will not go above 7.34ms??
Well, usually very agaist dyno's but new place opened not far from house. Talked with guy who was cool and pretty cheap..
Car had been feeling sort of dissapointing since, had a conservative tune in with only 32 degrees timing.
-First pass 377 hp at 5500 - 14.5 air fuel
-Second pass added 3 lb pressure and jumped to 419 at 5600 or so. 13.8 air fuel.
-third pass added 10% to pe enrichment, jumped again to 434 at 13.5.
- 4th pass added another 15%, jumped to 451 @ 6k, 13.2 air fuel.
- 5th pass added more to PE enrichment no change at all.
- 6th pass added 4° TIMING TO 36, made 463 @ 6100
- 7th pass added another 2° to 38°, made 468 @ 6100
Pretty good on 93, hope to hit track Thursday, but weather is looking bad.
Made more than I expected, expected 450ish.. Seems that injectors refuse to open any longer than 7.34ms??? Last three changes they maxed at 7.34 and stayed there - Something with code? VE is currently at 100 and PE enrich was raised from 10° to 24° with no change in PW - and they hold steady at 7.34 after initial AE.
I also know the Miniram is now a restriction only flowing 283, I suspect with a single plane I will gain 30-40 HP and 1000 rpm.. Looking at data, I started pulling vacuum at 5000 rpm. Makes peak TQ somewhere around 4k it seems at 465 and stays very flat to 5200..
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Car had been feeling sort of dissapointing since, had a conservative tune in with only 32 degrees timing.
-First pass 377 hp at 5500 - 14.5 air fuel
-Second pass added 3 lb pressure and jumped to 419 at 5600 or so. 13.8 air fuel.
-third pass added 10% to pe enrichment, jumped again to 434 at 13.5.
- 4th pass added another 15%, jumped to 451 @ 6k, 13.2 air fuel.
- 5th pass added more to PE enrichment no change at all.
- 6th pass added 4° TIMING TO 36, made 463 @ 6100
- 7th pass added another 2° to 38°, made 468 @ 6100
Pretty good on 93, hope to hit track Thursday, but weather is looking bad.
Made more than I expected, expected 450ish.. Seems that injectors refuse to open any longer than 7.34ms??? Last three changes they maxed at 7.34 and stayed there - Something with code? VE is currently at 100 and PE enrich was raised from 10° to 24° with no change in PW - and they hold steady at 7.34 after initial AE.
I also know the Miniram is now a restriction only flowing 283, I suspect with a single plane I will gain 30-40 HP and 1000 rpm.. Looking at data, I started pulling vacuum at 5000 rpm. Makes peak TQ somewhere around 4k it seems at 465 and stays very flat to 5200..
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From: sweden
Car: GTA -89
Engine: Blown 415"
Transmission: 4L80E
Axle/Gears: Strange 12-bolt
Re: Just dynoed car after porting heads, Inj will not go above 7.34ms??
Re: Just dynoed car after porting heads, Inj will not go above 7.34ms??
Thanks for any help.
Re: Just dynoed car after porting heads, Inj will not go above 7.34ms??
That would work, but I am already at 55psi and do not wish to go any higher than that unless I have to. I would likely need to up it to 62 or so the get any adjustability.
Supreme Member

Joined: Aug 1999
Posts: 2,441
Likes: 1
From: sweden
Car: GTA -89
Engine: Blown 415"
Transmission: 4L80E
Axle/Gears: Strange 12-bolt
Re: Just dynoed car after porting heads, Inj will not go above 7.34ms??
Make a copy of bin.
Use tunerpro go to "tools" "Advanced" "hex Editor"
Change the adresses quoted in link.
Its not hard at all, If you like you can email me the "virgin" bin and "your new one" and I can check it for you.....I could modify yours but I think you should atleast try to modify it by your self...........
Use tunerpro go to "tools" "Advanced" "hex Editor"
Change the adresses quoted in link.
Its not hard at all, If you like you can email me the "virgin" bin and "your new one" and I can check it for you.....I could modify yours but I think you should atleast try to modify it by your self...........
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From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: Just dynoed car after porting heads, Inj will not go above 7.34ms??
Lean is mean man, 13.2 is probably making max power but it may want to be richer. I never knew there was a PW limit in 730 but I've never tuned 8D so that may be a reason why 
What size injectors do you have now? Will they support much more power? Those are some very stout numbers.

What size injectors do you have now? Will they support much more power? Those are some very stout numbers.
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Re: Just dynoed car after porting heads, Inj will not go above 7.34ms??
RBob.
Re: Just dynoed car after porting heads, Inj will not go above 7.34ms??
Make a copy of bin.
Use tunerpro go to "tools" "Advanced" "hex Editor"
Change the adresses quoted in link.
Its not hard at all, If you like you can email me the "virgin" bin and "your new one" and I can check it for you.....I could modify yours but I think you should atleast try to modify it by your self...........
Use tunerpro go to "tools" "Advanced" "hex Editor"
Change the adresses quoted in link.
Its not hard at all, If you like you can email me the "virgin" bin and "your new one" and I can check it for you.....I could modify yours but I think you should atleast try to modify it by your self...........
Thank you very much! It is time I do this for myself, I will make change and send to you tonight. Thanks again.
Re: Just dynoed car after porting heads, Inj will not go above 7.34ms??
Lean is mean man, 13.2 is probably making max power but it may want to be richer. I never knew there was a PW limit in 730 but I've never tuned 8D so that may be a reason why 
What size injectors do you have now? Will they support much more power? Those are some very stout numbers.

What size injectors do you have now? Will they support much more power? Those are some very stout numbers.
Thanks Orr, I am happy with the numbers it layed down.. It doing better than expected with Mini Ram, I would expect to pick up atleast 30 with the single plane swap..
Re: Just dynoed car after porting heads, Inj will not go above 7.34ms??
Make a copy of bin.
Use tunerpro go to "tools" "Advanced" "hex Editor"
Change the adresses quoted in link.
Its not hard at all, If you like you can email me the "virgin" bin and "your new one" and I can check it for you.....I could modify yours but I think you should atleast try to modify it by your self...........
Use tunerpro go to "tools" "Advanced" "hex Editor"
Change the adresses quoted in link.
Its not hard at all, If you like you can email me the "virgin" bin and "your new one" and I can check it for you.....I could modify yours but I think you should atleast try to modify it by your self...........
A question though, what does the change allow? does it allow you to place value higher than 100 in VE, or does it allow the % added with PE adder to be effective? Thanks for helping again.
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