VS402 Stroker A&A YSI Build near completion
05-02-2011, 06:57 PM
#61
Safety Car
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05-05-2011, 06:21 PM
#63
Burning Brakes
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Still working on getting the Balancer changed out. Ed is out of town so no tuning will be possible until he returns first week of June. Did find out the the balancer is not an under drive as first thought. Chris at ECS says that I should be higher with a stock diameter and 3"YSI so I still think I may have an additional issue. After I get everything back together I will do a pressure test and take a close look at the Mondo.
05-23-2011, 10:54 PM
#64
Burning Brakes
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Still working on getting the Balancer changed out. Ed is out of town so no tuning will be possible until he returns first week of June. Did find out the the balancer is not an under drive as first thought. Chris at ECS says that I should be higher with a stock diameter and 3"YSI so I still think I may have an additional issue. After I get everything back together I will do a pressure test and take a close look at the Mondo.
Waiting on Ed to return from his Europe/Asia tuning trip to get it back up on the dyno first week of June. If it does not put down power this time its in the motor.
05-30-2011, 07:04 AM
#65
Burning Brakes
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One thing that I have noticed is that the YSI is a pretty tight fit under the factory hood. You can see where the sound barrier touches on top of the blower housing from the scuff mark that is ever present on top of it.
05-30-2011, 11:11 AM
#66
Le Mans Master
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Seems kinda strange for anything to puddle under boost. I ran a 50/50 mix activating progressively from 2-3psi maxing out an m10 nozzle for 2 years making over 700rwhp on a stock ls6 with zero issues.
Regardless of all this debate you are going to need a certain effective octane to be able to throw enough timing at this setup to make power safely.
Regardless of all this debate you are going to need a certain effective octane to be able to throw enough timing at this setup to make power safely.
05-30-2011, 01:35 PM
#67
Safety Car
Mike
06-10-2011, 03:11 PM
#69
Burning Brakes
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Final Dyno Today
Well final tuning done today and I could not be more disgusted. Right now I sit with 664rwhp and 616tq. This motor dynoed NA at 434rwhp 438tq. I am sure 93deg outside temps and back to back pulls did not help much with the final results.
I am not really sure where to go from here and I am tired of not being able to drive the car so work is done till winter. No one can seem to figure out why this motor is not laying down the power it should be.
Andy say the blower seems to be operating fine and that the motor is down on power for the amount of boost it is seeing.
Ed says the motor is fine but the blower seem like its down on boost. He did say that we could easily break 700 with 100% Meth. This is far off from the 800 mark I was shooting for
. Right now I run 50/50 meth which is set to come in at 4psi and maxes at around 8psi. I am not pointing fingers just very pissed that a 15,000.00 build has netted me crap for power.
Spec on the Motor:
Forged 402
9.6:1 Claimed but not verified
Comp Cam 227/239 613/623 115Lsa
Stock heads with seat work w/Lunati dual springs
Kook 1 3/4 headers
Bassanni Cat back with High flow Cats
Vortech YSI 3" Pulley
IW 8" 10% OD Balancer
Boost logged at 14.9 max at 6400rpm (No belt slip observed)
Snow meth 50/50 mix
23Deg total timing I do believe
Dyno Sheet
So if you have input lets hear it.
I am not really sure where to go from here and I am tired of not being able to drive the car so work is done till winter. No one can seem to figure out why this motor is not laying down the power it should be.
Andy say the blower seems to be operating fine and that the motor is down on power for the amount of boost it is seeing.
Ed says the motor is fine but the blower seem like its down on boost. He did say that we could easily break 700 with 100% Meth. This is far off from the 800 mark I was shooting for
. Right now I run 50/50 meth which is set to come in at 4psi and maxes at around 8psi. I am not pointing fingers just very pissed that a 15,000.00 build has netted me crap for power.Spec on the Motor:
Forged 402
9.6:1 Claimed but not verified
Comp Cam 227/239 613/623 115Lsa
Stock heads with seat work w/Lunati dual springs
Kook 1 3/4 headers
Bassanni Cat back with High flow Cats
Vortech YSI 3" Pulley
IW 8" 10% OD Balancer
Boost logged at 14.9 max at 6400rpm (No belt slip observed)
Snow meth 50/50 mix
23Deg total timing I do believe
Dyno Sheet
So if you have input lets hear it.
Last edited by Res1cue; 06-10-2011 at 03:33 PM.
06-10-2011, 03:57 PM
#70
Le Mans Master
Son of a beach! Something doesn't add up. I don't believe you are running that much timing, especially if Ed is saying 100% meth would net you more power, I would imagine he would throw some more timing at it. This leads me to believe you're low on timing right now. Maybe 15 or so? So double check the timing. The boost graph isn't exactly linear but not what I'm used to seeing as far as belt slip.
06-10-2011, 04:04 PM
#71
Melting Slicks
Son of a beach! Something doesn't add up. I don't believe you are running that much timing, especially if Ed is saying 100% meth would net you more power, I would imagine he would throw some more timing at it. This leads me to believe you're low on timing right now. Maybe 15 or so? So double check the timing. The boost graph isn't exactly linear but not what I'm used to seeing as far as belt slip.
We did make 683 with 2 more degrees of timing in it. Had it up to 25.5 degress on my scanner. It seemed to like it, but without pulling and reading the plugs, I didn't feel comfortable with any more.
It was seriously hot today. That and we did several runs back to back.
I know with just a few degrees better weather, and straight meth, we'd break 700, but it still seems way off. Engine seems to run just fine otherwise.
Still, it seems like it's low on boost. Maybe I'm wrong there, but I figured we'd be seeing 18 psi.
Last edited by edcmat-l1; 06-10-2011 at 04:08 PM.
06-10-2011, 04:31 PM
#72
No real signs of belt slip. The boost was consistant run to run. Never deviated. No black dust commonly found with belt slip.
We did make 683 with 2 more degrees of timing in it. Had it up to 25.5 degress on my scanner. It seemed to like it, but without pulling and reading the plugs, I didn't feel comfortable with any more.
It was seriously hot today. That and we did several runs back to back.
I know with just a few degrees better weather, and straight meth, we'd break 700, but it still seems way off. Engine seems to run just fine otherwise.
Still, it seems like it's low on boost. Maybe I'm wrong there, but I figured we'd be seeing 18 psi.
We did make 683 with 2 more degrees of timing in it. Had it up to 25.5 degress on my scanner. It seemed to like it, but without pulling and reading the plugs, I didn't feel comfortable with any more.
It was seriously hot today. That and we did several runs back to back.
I know with just a few degrees better weather, and straight meth, we'd break 700, but it still seems way off. Engine seems to run just fine otherwise.
Still, it seems like it's low on boost. Maybe I'm wrong there, but I figured we'd be seeing 18 psi.
I'd recommend a decent set of heads, Flip drive, 100% meth, +10.0 compression. Then if it it doesn't break 800 with that pulley combo then I would get a new head unit.
Last edited by APSGTO; 06-10-2011 at 04:37 PM.
06-10-2011, 04:36 PM
#73
Le Mans Master
I am pretty stumped. Not to rub it in but I make more on stock LS2 cubes/14#/19', 11.5:1. That cam seems like a good choice. >20' sounds like a **** ton of timing to me but if it's not knocking and still gaining power then 
. Do you know what pistons are in it? Flat tops with valve reliefs? I know the motor made the numbers above on its own but that was a while ago. Maybe a compression test? Wouldn't take too long. Just spit balling. I really have no idea.
. Do you know what pistons are in it? Flat tops with valve reliefs? I know the motor made the numbers above on its own but that was a while ago. Maybe a compression test? Wouldn't take too long. Just spit balling. I really have no idea.
06-10-2011, 05:13 PM
#74
Burning Brakes
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06-10-2011, 05:28 PM
#76
Melting Slicks
06-10-2011, 05:46 PM
#78
Safety Car
Just a shot in the dark.Haven't heard of anybody running that exhaust system? Could that be a problem? I had a set of Bullits yrs ago that had a internal problem and really resticted the car.
06-10-2011, 06:14 PM
#79
Le Mans Master
434 rwhp sounds awfully lite for a 402 with that cam and bolt ons. Stock LS2 with that cam and bolt ons would be higher than that. Would the boost go up if the exhaust was restricted? I know it would with a p/d blower.
Last edited by old motorhead; 06-10-2011 at 06:18 PM.
06-10-2011, 07:21 PM
#80
So your heads are stock, your intake is stock and your headers are a touch small for that many cubes. I would say there is a easy 50rwhp in those 3 areas, which gets you passed 700rwhp. Timing is definately not consertative, but that is what the meth is for. 15#s is also a good number. On my LS7 with a blower cam, FAST intake, 1 7/8 headers, 3" exhaust, ported heads, 10.25 compression and 100% Alky, I am making about 15#s and 890rwhp. I also believe your motor was a little down on power to start. 434rwhp is about 50rwhp low.