My 383 rwhp estimate?
09-24-2013, 10:09 AM
#83
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"It's far more impressive to be quiet and fast than loud and slow." - John Lingenfelter
09-25-2013, 09:11 AM
#84
Its clear the OP just wanted to know how much power his car would make. He's got his back up with everyone telling him his CR is too low and that apparently the shop he's using isn't the best... I'm sure he's going to take away a lot of good pointers from this thread for his next project. Does he really need to come out and itemize everything people think he's done wrong and publicly accept or apologize for that? Is that what people are after?? Sounds like the motor is almost finished. Let him get his ride up and running and who knows maybe he'll be perfectly content with the car or maybe he'll know it has to be much wilder next time around. I'd say get the current config as close to or above 11:1 CR as possible and put it through the paces. I mentioned before he "might" be able to mill the heads down even more to bump up CR; maybe get it to 11.5:1, but just make sure there's enough piston to valve clearance and realise future applications for the heads may be more limited.
09-25-2013, 09:43 AM
#86
^^^ +1, especially if its an auto, m6 you might get 400 on a good tune. Mystery Bird ran a similar setup for a few years, xfi280 and home ported heads, got into the 11.7s after alot of fine tuning. He was trapping 112 in an auto at 3700lbs which put him at about 427hp at the crank according to online calculators. -13% drivetrain loss for an m6 and 18% for an auto, puts it at 371 for an m6 and 350 for an a4. Your trickflows may flow a little more, so you may be a little higher, but not much. After he did more porting and 2.02/1.55 valves he got 116, or 412 in an m6 or 387 in an a4. I'm not bashing you'll still have a fun car, just being realistic.
Last edited by bufmatmuslepants; 09-25-2013 at 09:50 AM.
09-25-2013, 12:37 PM
#90
^^^ +1, especially if its an auto, m6 you might get 400 on a good tune. Mystery Bird ran a similar setup for a few years, xfi280 and home ported heads, got into the 11.7s after alot of fine tuning. He was trapping 112 in an auto at 3700lbs which put him at about 427hp at the crank according to online calculators. -13% drivetrain loss for an m6 and 18% for an auto, puts it at 371 for an m6 and 350 for an a4. Your trickflows may flow a little more, so you may be a little higher, but not much. After he did more porting and 2.02/1.55 valves he got 116, or 412 in an m6 or 387 in an a4. I'm not bashing you'll still have a fun car, just being realistic.
09-25-2013, 02:00 PM
#91
^^^ says the guy who's never ran his car at the strip, for all you know my bolton only 12.3 car could walk your 383 at the track but because you say it "feels fast" you think all is well. For all you know there could be a false knock pulling timing and leaving 50hp untapped but since it "feels fast" you'll never know.
ET doesn't tell hp, trap speed does.
Those online calculators are tools just like a dyno is a tool. Based on my 111mph trap speed if I weighed 3500 it would say I had 393 or 341rwhp, which is obviously not right, but plug in my 3200lb weight and it gives 312rwhp, about right on par for what a Bolton only lt1 puts down. Same for joes car, I'm guessing his 3340 is without driver since its a street car with a cage and 9", so plug in a 200lb driver, 124.1mph, -.18% gives 455.92rwhp on the NOSE.
http://www.wallaceracing.com/et-hp-mph.php
Earlier in the thread you guys were bashing nastyc4 for his 13.5 at 128, but the 13.5 doesn't tell hp, the 128 does. The track is the best test, hence me 200+ passes and zero dyno pulls.
ET doesn't tell hp, trap speed does.
Those online calculators are tools just like a dyno is a tool. Based on my 111mph trap speed if I weighed 3500 it would say I had 393 or 341rwhp, which is obviously not right, but plug in my 3200lb weight and it gives 312rwhp, about right on par for what a Bolton only lt1 puts down. Same for joes car, I'm guessing his 3340 is without driver since its a street car with a cage and 9", so plug in a 200lb driver, 124.1mph, -.18% gives 455.92rwhp on the NOSE.
http://www.wallaceracing.com/et-hp-mph.php
Earlier in the thread you guys were bashing nastyc4 for his 13.5 at 128, but the 13.5 doesn't tell hp, the 128 does. The track is the best test, hence me 200+ passes and zero dyno pulls.
Last edited by bufmatmuslepants; 09-25-2013 at 02:23 PM.
09-26-2013, 07:51 AM
#92
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DVS LT1 I am curious, what kind of ET's are you pulling with your setup. As far as complaining about dynosheets, it's like that everywhere. No one really races anymore. This place and cz28.com used to be pretty active on Wednesday, Friday and Sundays of people posting up time slips. All that's ever shown now is a signature with no track times...
09-26-2013, 07:55 AM
#93
DVS LT1 I am curious, what kind of ET's are you pulling with your setup. As far as complaining about dynosheets, it's like that everywhere. No one really races anymore. This place and cz28.com used to be pretty active on Wednesday, Friday and Sundays of people posting up time slips. All that's ever shown now is a signature with no track times...
09-26-2013, 12:09 PM
#94
My 12.39 was at 109 because I missed 4th. 1000 DA, 1.68 60', couldn't get it to hook again but best trap was 111 on a pass it spun and I actually hit 4th. 3250lbs race weight full interior, salad shooters with ET streets, skinnys on front, was the only time I raced with the 9" and did 3 passes (cecil last november at LTx shootout), on the 10 bolt I did hundreds at MIR and Old Dominion, starting at a 9.016 1/8th my rookie day, to 12.53 110.33 1.87 60' -800 DA before valvetrain, EWP, lid and suspension. Had it not been for looking at others times/mph and rwhp numbers and being able to go to the track and do back to back runs at different shift points I would have never figured out that i was not at full potential and to shift it at 6200 rather than 5500 stock redline. Same goes for your car, you could have valve float issues, or be shifting too low or too high.
The second quote yes was towards the OP.
I 100% agree regardless of compression ratio, if he gets it sorted out and running to potential it will feel awesome and hell have a huge **** eating grin on his face when he drives it. That being said, even if its not at full potential, say suffering from a bad tune or false knock, it'll still feel faster than a stock car, which is where mph and dyno numbers and online calculators can help determine how far off he is from full potential. I think full potential is 390rwhp and 116mph 11.5.
The second quote yes was towards the OP.
I 100% agree regardless of compression ratio, if he gets it sorted out and running to potential it will feel awesome and hell have a huge **** eating grin on his face when he drives it. That being said, even if its not at full potential, say suffering from a bad tune or false knock, it'll still feel faster than a stock car, which is where mph and dyno numbers and online calculators can help determine how far off he is from full potential. I think full potential is 390rwhp and 116mph 11.5.
Last edited by bufmatmuslepants; 09-26-2013 at 12:18 PM.
09-26-2013, 01:08 PM
#95
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kettle, meet no track turd bucket. Shush up, man crush.
Not really. Dynomometers can give all kinds of wonky results. Especially if the operator does not know or care about having it calibrated. I have been to three different dynos in years past and had a ~50rwhp difference beteen them. The operator of one that ran the lowest told me something was wrong with my car. He had a SS, saw him at the track and beat him badly. I asked him if there was still a problem in which I received no response. Only way to truly compare two platforms is for them to race side by side or have exact data from each race day. Whenever dyno sheet threads have come up in the past it has turned into a bunch of bickering nonsense.
Not really. Dynomometers can give all kinds of wonky results. Especially if the operator does not know or care about having it calibrated. I have been to three different dynos in years past and had a ~50rwhp difference beteen them. The operator of one that ran the lowest told me something was wrong with my car. He had a SS, saw him at the track and beat him badly. I asked him if there was still a problem in which I received no response. Only way to truly compare two platforms is for them to race side by side or have exact data from each race day. Whenever dyno sheet threads have come up in the past it has turned into a bunch of bickering nonsense.
How many pounds of boost you plan on running?