I got my car on a dyno last weekend. I have an SMC progressive kit and a TT alky chip on a fresh engine. First pull was 423hp very rich, I raised the alky start point to 12psi and Max to 22psi. 2nd pull 432hp still very rich. I left start at 12psi and raised max to 26psi. 3rd pull was 439 hp but still very rich. This is where my cam sensor failed and ended my day. My next step was going to be lowering wot fuel 10% by the TT chip. Is this the best move or should cut the alcohol. I'm running straight denature alky (homedepot stuff). Car was so rich the wideband on the dyno jet could not read it. O2 readings start at 10 and my car was still below. Boost is steady at 25 psi. I ordered a cam repair kit and will make another dyno appointment as soon as its in.
Went to dyno, Need advice for tuning!
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Altho its not my system, you adjust fuel for air fuel, and you adjust alky for knock suppression. If its rich, then you drop fuel. If it knocks you add alky.
You may want to call Steve at SMC since he knows his system best and what to adjust for best performance.
Good luck,
You may want to call Steve at SMC since he knows his system best and what to adjust for best performance.
Good luck,
Not on a Buick, especially with alcohol being injected. Target is 10.8-11.0
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Yep, 10.8 here. 
salvageV6
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I use 11.5 to 12.0 on the dyno. for best results.
And 11.5 when racing.
Although it might be the stock headgaskets helping out the stock motor at 24/25psi. :smile:
I assume he too is running a stock motor with those HP numbers.
10.8 would be oink oink on my car.
And 11.5 when racing.
Although it might be the stock headgaskets helping out the stock motor at 24/25psi. :smile:
I assume he too is running a stock motor with those HP numbers.
10.8 would be oink oink on my car.
Well that is good to know, Wideband is new to me. Would that put me around 770 on the scanmaster? I'm not sure how far under 10.0 I am. I have no knock at 25psi. So I think my options are raise boost :biggrin: and adjust fuel from there but I need to be as safe as possible with my engine, I could cut the fuel down and add timing until i see some knock and subtract timing to no knock, or cut back on the alcohol or mix with water?
Although it might be the stock headgaskets helping out the stock motor at 24/25psi. :smile:
I assume he too is running a stock motor with those HP numbers.
10.8 would be oink oink on my car.
The motor actually has forged crank, K1 rods, forged piston, mls headgaskets, GN1 heads, Comp roller cam and rockers. The motor has about 450 miles so it needs to be tuned along with my first alky experience. Those HP numbers are my baseline.
GNVYUS 1
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Forget the Scanmaster readings, use the wideband and Razors alky tuning tip.
I'd personally not alter the alky tip in and definitely not pull out alky when running that much boost and timing.
What are your other fuel readings, idle BLM or AF/R, fuel pressure line off etc?
I'd personally not alter the alky tip in and definitely not pull out alky when running that much boost and timing.
What are your other fuel readings, idle BLM or AF/R, fuel pressure line off etc?
salvageV6
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Well if you have all those parts on the motor you're missing a good 100 HP.
I'd guess you might be a bit rich.
And no longer guess it's a stock motor.
Better shoot for that 10.8 and hope the power comes back.
I'd guess you might be a bit rich.
And no longer guess it's a stock motor.
Better shoot for that 10.8 and hope the power comes back.
FP was 47psi line off, BLM was 128, Int 128, AF 05,L8 35-38, IAC 24, 850 rpm, temp 162, CC sitting at 253, o2 710-714.
Lower FP to 43psi line off, BLM 129, INT 125-134, AF 06, L8 35-37,IAC 29, 800-850 rpm, CC cycling, O2 210-746.
I took these reading tonight.
Lower FP to 43psi line off, BLM 129, INT 125-134, AF 06, L8 35-37,IAC 29, 800-850 rpm, CC cycling, O2 210-746.
I took these reading tonight.
Your fuel pressure seems high, you may want to triple check those readings.
Alcohol has a lot lower stoich than gas, when you mix them it brings the target down.
http://www.campbellautomotive.com/1000hpv6.wmv
This was tuned on 91 octane at 10.0:1 AFR So I wonder how much power it could have made at 11.5:1
Alcohol has a lot lower stoich than gas, when you mix them it brings the target down.
http://www.campbellautomotive.com/1000hpv6.wmv
This was tuned on 91 octane at 10.0:1 AFR So I wonder how much power it could have made at 11.5:1
Pronto
No amount of evidence will ever persuade an idiot.
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Full Throttle has the Powerlogger on special. Might be a good time to get it. You can pull fuel (little at a time!) and save the file so you can study everything. Who did the dyno? BTW straight meth is cheaper per gallon than HD denatured.
Wouldn't lowering boost make it richer if anything?
salvageV6
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You need more accurate data as others have suggested. :smile:
A stock motor at that boost (25) makes about that HP at 11.5 A/F with denatured alky. and an EFI pump.
On the stock headgaskets too with no broken parts. :biggrin:
And we all know that no broken parts isn't the way some "gooroos" tune.
Drop the boost and try to get in the 10.8 A/F range and shoot for that extra 100 HP you are missing. :frown:
Logging some runs with a good logging scantool will help you sort it all out.
What boost is the chip set for? What timing you using?
What rpm's you going to?
A stock motor at that boost (25) makes about that HP at 11.5 A/F with denatured alky. and an EFI pump.
On the stock headgaskets too with no broken parts. :biggrin:
And we all know that no broken parts isn't the way some "gooroos" tune.
Drop the boost and try to get in the 10.8 A/F range and shoot for that extra 100 HP you are missing. :frown:
Logging some runs with a good logging scantool will help you sort it all out.
What boost is the chip set for? What timing you using?
What rpm's you going to?
