Does this add up with????????
Thread Starter
Le Mans Master
Joined: Jul 2010
Posts: 6,008
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Does this add up with????????
I have a 99 vette ls1 stock engine 346 excpet for 42 injectors, kooks 1 7/8 headers, full ghl no cats exhaust,D1 procharger 3.4pulley. A&A dyno tuned 552 whp 12 psi boost. Now fully forged 9.5.1com, 6.0L block, LPE elderbrock racing alumin heads, 224,575 comp cam, 90mm TB, Fast 90mm intake same headers and exh. 80 injectors, D1- 3.1 pulley with IW 8" damper and flip drive. shop in chicago sub dyno tuned at 512 whp is this possible? They said thats all they could get out of it and said that was really good for the set up. Is this possible. I put over 8 grand into upgrades and got less hp???????
PS A&A 1000hp fuel system 93 pump gas no meth and they did a 3 bar SD tune. I will be picking the car up 2day so i would like to get info if possible to argue this if possible and their saying my BOV is causing it to surge now. It never surged before they said to put on a by pass valve????? Need help with ammo to justify them to do a better job or is this set up correct? Thanks guys
PS A&A 1000hp fuel system 93 pump gas no meth and they did a 3 bar SD tune. I will be picking the car up 2day so i would like to get info if possible to argue this if possible and their saying my BOV is causing it to surge now. It never surged before they said to put on a by pass valve????? Need help with ammo to justify them to do a better job or is this set up correct? Thanks guys
Team Owner
Joined: Jan 2007
Posts: 29,063
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From: cookeville tennessee
I have a 99 vette ls1 stock engine 346 excpet for 42 injectors, kooks 1 7/8 headers, full ghl no cats exhaust,D1 procharger 3.4pulley. A&A dyno tuned 552 whp 12 psi boost. Now fully forged 9.5.1com, 6.0L block, LPE elderbrock racing alumin heads, 224,575 comp cam, 90mm TB, Fast 90mm intake same headers and exh. 80 injectors, D1- 3.1 pulley with IW 8" damper and flip drive. shop in chicago sub dyno tuned at 512 whp is this possible? They said thats all they could get out of it and said that was really good for the set up. Is this possible. I put over 8 grand into upgrades and got less hp???????
PS A&A 1000hp fuel system 93 pump gas no meth and they did a 3 bar SD tune. I will be picking the car up 2day so i would like to get info if possible to argue this if possible and their saying my BOV is causing it to surge now. It never surged before they said to put on a by pass valve????? Need help with ammo to justify them to do a better job or is this set up correct? Thanks guys
PS A&A 1000hp fuel system 93 pump gas no meth and they did a 3 bar SD tune. I will be picking the car up 2day so i would like to get info if possible to argue this if possible and their saying my BOV is causing it to surge now. It never surged before they said to put on a by pass valve????? Need help with ammo to justify them to do a better job or is this set up correct? Thanks guys
Something is wrong here on that tune are set up someplace. You for sure should have more rwhp than this.
Team Owner
Joined: Jan 2007
Posts: 29,063
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From: cookeville tennessee
Should be in the 600 plus range also why did the guy do a 3 bar on this unless you where going over 18 lbs of boost should stay with a 2 bar. I dont think the shop does what he is doing on this set up man.... Robert
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Joined: Apr 2010
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From: alabama
When I had my 383 with similar mods except I had a v-2 t-trim I made 654 at 9 psi so your numbers seem low. Who installed all the parts?
Team Owner
Joined: Jan 2007
Posts: 29,063
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From: cookeville tennessee
But even with a very safe tune on his car and no meth. These # of just 500 rwhp is crap for all this car has in it. Would like to see the dyno pulls and chart on it. There has be be a big boost lose are something here... I say above but if the guy is a tuner at all can look and see a drop are something here.....Robert
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From: Granby, MA
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I have a 99 vette ls1 stock engine 346 excpet for 42 injectors, kooks 1 7/8 headers, full ghl no cats exhaust,D1 procharger 3.4pulley. A&A dyno tuned 552 whp 12 psi boost. Now fully forged 9.5.1com, 6.0L block, LPE elderbrock racing alumin heads, 224,575 comp cam, 90mm TB, Fast 90mm intake same headers and exh. 80 injectors, D1- 3.1 pulley with IW 8" damper and flip drive. shop in chicago sub dyno tuned at 512 whp is this possible? They said thats all they could get out of it and said that was really good for the set up. Is this possible. I put over 8 grand into upgrades and got less hp???????
PS A&A 1000hp fuel system 93 pump gas no meth and they did a 3 bar SD tune. I will be picking the car up 2day so i would like to get info if possible to argue this if possible and their saying my BOV is causing it to surge now. It never surged before they said to put on a by pass valve????? Need help with ammo to justify them to do a better job or is this set up correct? Thanks guys
PS A&A 1000hp fuel system 93 pump gas no meth and they did a 3 bar SD tune. I will be picking the car up 2day so i would like to get info if possible to argue this if possible and their saying my BOV is causing it to surge now. It never surged before they said to put on a by pass valve????? Need help with ammo to justify them to do a better job or is this set up correct? Thanks guys
PS: Be warned though...Dyno numbers are sometimes used over the car's over all performance. Don't let big numbers fool you. Be smart and make sure your car is running perfect. If it is and your numbers look good you're all set. It is a balancing act. I wouldn't sacrifice the car's reliability just to get 20 more rwhp to show up on a dyno.
Last edited by XtremeVette; Oct 21, 2011 at 01:19 PM.
Team Owner
Joined: Jan 2007
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From: cookeville tennessee
Need to see the pulls and graph.. Also tell him not going to pay him crap for a job like that on these parts, And him tell you that this is good # on that unit and parts. He really dont know what he is doing here.... Robert
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From: Granby, MA
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How you doing Robert? I still gotta go for a ride with ya sometime lol.
Thread Starter
Le Mans Master
Joined: Jul 2010
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Thanks for all the replies guys. I'm on the go so i have a few seconds here. I'll have the graph later to nite after i talked to them i guess they made some changes 529whp 544trq with 3.1 pulley and 8"damper starting to slip at 5700rpm to 6700rpmwas down to 425hp and 325 trq and they resolved the surging i'll be back later thanks guys.
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From: West Bloomfield MI
Could be a ton of things - slipping belt - clogged cats - three spark plugs disconnected - etc.. 5 anything with that setup is -way- under par. I made 505 rwhp on a Mustang dyno with a D-1SC, totally stock motor, using a 4.5'' pulley and a six rib belt.
Pro
Joined: Sep 2007
Posts: 583
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From: Atlanta GA
This sounds similar to what I was building. With the pulley sizes you are overspinning that blower. With your pulley combo you are at ~68744 rpm impellar speed. Max recommended that I have seen is 62000rpm
Crank Pulley: 8.00"
Blower Pulley: 3.1"
D1sc Step Up: 4.1
Max RPM: 6500
8.00 x 6500 = 52000
52000 x 4.1 = 213200
213200 / 3.1 = 68774 rpm impeller speed
What BOV are you running? You could be bleeding off boost. This would also be a cause of compressor surge. You also should not be slipping the belt with the Flip drive. The belt slip can rob you of alot of power. Check all you vaccuum hoses. Any number of them can blow off at those boost levels.
Just for reference I was at 601rwhp on a mustang dyno at 5700rpm with a D1SC 3.85 pulley and stock crank pulley.
Wesley
Crank Pulley: 8.00"
Blower Pulley: 3.1"
D1sc Step Up: 4.1
Max RPM: 6500
8.00 x 6500 = 52000
52000 x 4.1 = 213200
213200 / 3.1 = 68774 rpm impeller speed
What BOV are you running? You could be bleeding off boost. This would also be a cause of compressor surge. You also should not be slipping the belt with the Flip drive. The belt slip can rob you of alot of power. Check all you vaccuum hoses. Any number of them can blow off at those boost levels.
Just for reference I was at 601rwhp on a mustang dyno at 5700rpm with a D1SC 3.85 pulley and stock crank pulley.
Wesley
Drifting
Joined: Mar 2003
Posts: 1,533
Likes: 171
From: Oklahoma City OK
I would say it is the clutch if everything else looks perfect, but you are just down on numbers. If the end of the chart looks like it is falling off, it could be valve float?
I am trying to find my gremlin right now, I think I may have just found it. Intake gaskets. But my power band looks funky.. so I doubt thats the problem you are having.
I am trying to find my gremlin right now, I think I may have just found it. Intake gaskets. But my power band looks funky.. so I doubt thats the problem you are having.
Team Owner
Joined: Jan 2007
Posts: 29,063
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From: cookeville tennessee
This sounds similar to what I was building. With the pulley sizes you are overspinning that blower. With your pulley combo you are at ~68744 rpm impellar speed. Max recommended that I have seen is 62000rpm
Crank Pulley: 8.00"
Blower Pulley: 3.1"
D1sc Step Up: 4.1
Max RPM: 6500
8.00 x 6500 = 52000
52000 x 4.1 = 213200
213200 / 3.1 = 68774 rpm impeller speed
What BOV are you running? You could be bleeding off boost. This would also be a cause of compressor surge. You also should not be slipping the belt with the Flip drive. The belt slip can rob you of alot of power. Check all you vaccuum hoses. Any number of them can blow off at those boost levels.
Just for reference I was at 601rwhp on a mustang dyno at 5700rpm with a D1SC 3.85 pulley and stock crank pulley.
Wesley
Crank Pulley: 8.00"
Blower Pulley: 3.1"
D1sc Step Up: 4.1
Max RPM: 6500
8.00 x 6500 = 52000
52000 x 4.1 = 213200
213200 / 3.1 = 68774 rpm impeller speed
What BOV are you running? You could be bleeding off boost. This would also be a cause of compressor surge. You also should not be slipping the belt with the Flip drive. The belt slip can rob you of alot of power. Check all you vaccuum hoses. Any number of them can blow off at those boost levels.
Just for reference I was at 601rwhp on a mustang dyno at 5700rpm with a D1SC 3.85 pulley and stock crank pulley.
Wesley
Thread Starter
Le Mans Master
Joined: Jul 2010
Posts: 6,008
Likes: 723