400 WHP yet?
- Thread starter GHOSTWHISPER
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igdrasil said:
it can't be Beau's fault... all he tells them now is the compression ratio, the piston diameter, and wheither its long or standard rod length. there are several cars running the long rod combo now, so thats not it.
and the problem is not the wrist pin itself, its the location of it on the piston. CP either placed it too close to the top, or didn't machine out anything directly over the pin.
the thing with CP is that before machining his long od 8.9:1 pistons should be identical to my 8:1 pistons. I'm thinking one of those guys just dropped the ball... which is so surprising, cause CP is usually flawless.
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No problem with my long rod, 8.5 setup... interesting that CP screwed up.
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PaulMP3 said:
Yeah everything has been going real smooth until this... it's all taken way longer than it should... but this was the first actual "problem" so... hopefully we get it sorted out and things will move along from there!
Later,
Steve
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RyanJayG said:
Only possible way it could be Beau's fault... and I doubt it... is if he told them the wrong rod length. So I'm having my machinist confirm the rod measurements and width etc... and then I'll talk to CP on Monday and verify what they have on the work order from Beau. Either way it is a mistake somewhere and not that big of a deal. I don't want anybody thinking that MAM or CP does anything short of great work... mistakes happen and unfortunately someone somewhere made a mistake on this one... so I just need them to help me get it corrected... That's all
. But yeah... basically the "small end" gap in the piston is a little more narrow than it should be and there isn't enough space above wrist pin... I'll post a picture shortly.NSNMotorsports
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pdhaudio83 said:
Yep... when I talked to Beau, he said this is the first time he's ever heard of this! So lucky me I guess
.EDIT: here is the picture... the red box is the radius causing problems with the side to side clearance of the small end of the rod... and the blue box is the area where the rubbing is occuring.
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- Hemi Ram, 71 Plymth Scamp, 71 Plymth Duster 340, 69 Dart 340/4sp
Man that sux. Hopefully it will get resolved fast. Did you get them balanced yet? I had to take alittle out of the rod on the small end... Maybe you would get lucky and need the same done.
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BlkZoomZoom said:
They already balanced them all... everything is within like a .25 gram. I'm going to talk to CP on Monday, and sit down with my machinist and see where we end up getting to. If we can still get the motor together this week that is best for me... but I'm not going to compromise the pistons or the expensive motor over wanting to make it to some races...
Fact of the matter is... since rumor has it 400 has been crossed I'm going to establish a couple of things... I'm doing everything on pump gas... and tuning the hell out of the car.. I'm going to see how low of a psi I can run and cross 400 whp... and I'm going to see the absolute peak I can get out of my turbo.. which should be up to around 26 or 28 psi.. if I can crack 500 I will.. otherwise I'm not worrying about it... I refuse to sacrifice spool up time and raw area under the curve for a peak horsepower number. I'll all but guarantee I'll have one of the fastes spooling 400 whp car out there... the Evo III spools as fast as the little T25 and can move about 560 cfm (roughly 44 lbs) at 26 psi.
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igdrasil said:
Does anyone else have their job sheet? Here is a copy of mine (attached). So you can see if my compression height and so forth match or not.. That's what I"m guessing is off... I'm going to have my machinist check it as well to see what is up with it.
Later.
Steve
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igdrasil said:
Well I'm 8.9:1 compression... and our pump gas is 93 octane... (10% ethanol as well). So we'll see... but I don't see running race gas and claiming 400 whp as valid as that isn't the street use of the car... I'm sure i'll make more power with race gas (due to more aggressive timing etc) for when I compete in high speed events... but my baselines will ALWAYS be on pump gas..
Oh.. and the most powerful RX-8 in the nation is running a Microtech. They did a 20B swap on it... and the rx-8 is putting down like 1100 horse
. Igdrasil... do you have any contact info for that guy with the P5 down by you that is doing the wild numbers with the Microtech as well? I'd be curious to talk to him about a couple of things.
As far as compression versus boost... 1 full point of compression (9.1 versus 8.1, 8.1 being the lesser output as well) is roughly 10 horse I've read. And 1 psi is roughly 12-16 horse depending on efficiencies... so boost is better than compression
. But... as you reduce compression you lose spool up time as well because it is actually less air in the motor... so it is a real balancing act... later.
Steve
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Yeah, I see him often, like 2-5 times a month. If you want his phone number, let me know. But one piece of advice...hes a bit crazy, but hes a cool guy.
Hes the one that told me about the nitrous combination, he found out is better to run some boost and a small shot of nitrous (like 35) to spool the turbo up and not break the transmission when gearing and trying to keep boost up.
Hes the one that told me about the nitrous combination, he found out is better to run some boost and a small shot of nitrous (like 35) to spool the turbo up and not break the transmission when gearing and trying to keep boost up.
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Yeah if you have a phone number or an email addy that would be cool
nifty combo on the spooling. Timing is the other way to do it... some tricks can be played with timing to get your spool up smoothly.
nifty combo on the spooling
. Timing is the other way to do it... some tricks can be played with timing to get your spool up smoothly.Well good news... got my piston rod issue straightened out... wasn't CP's or MAM's fault . Was Oliver's. They didn't finish the small end of the rod. My machinist did some modification to it and polished it and everything went together perfectly.. so that's all set.. couple more things and I should be up and running! Hopefully she'll come to life mid next week if not early next week .
Later!
Steve
. Was Oliver's. They didn't finish the small end of the rod. My machinist did some modification to it and polished it and everything went together perfectly.. so that's all set.. couple more things and I should be up and running! Hopefully she'll come to life mid next week if not early next week . Later!
Steve
