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Originally posted by PVerdieck I think the Wise rear flared fenders look a lot nicer than the Pettit ones, but they require more body work. https://www.rx7club.com/forum/showth...5&pagenumber=2 |
Originally posted by David Hayes Hello, The car is now at Pettit Racing awaiting the conversion. I took it down on Saturday and spent the afternoon with Cam, the owner. He took me to the track in his 3 rotor - quite the awesome car. At 6 lbs. of boost, the car does 375 hp to the wheels and has about 365 lbs. of torque. Cam claims it's the torque in the 3 rotors that makes the car special. I like the HP gains and the torque! Anyway, at 12 lbs. of boost, the car should easily reach 400 hp to the wheels. I have several pics of Cam's car that I'll post soon. I'm now in the planning stages for the conversion. Here's the laundry list as of today. Feel free to comment and suggest! - 20B 3 rotor swap - includes subframe - huge customer front mounted intercooler - NASCAR hi-flow radiator - twin Cosmo turbos, reworked by Pettit and ceramic coated (will think about going single later) - engine management system (brand to be determined by Cam) - new wiring - probably a bunch of other "under the hood" stuff I'm forgetting now - back wheel flares molded into the car - 18X9's and 18X12.5's probably Forgeline WC3's in silver (not polished) unless someone has a better idea. - Track pro launch kit (street) - coil overs (if needed) - front anti-sway bar - Track pro street differential mounts (if needed) - big brake kit - Pettit resonator mid-section - Racing Beat dual tip exhaust - brake ducts installed on my Pettit 99 spec front bumper to blend the front end in better - Apexi side skirts - 99 spec front lip painted gloss black to match 99 spec front end Will update you soon! you'll put much more than 400 hp with 12 psi... hell 6 psi is good for 375 rwph. |
You should go ahead nad have the 6 speed tranny put in too. Then you don't have to deal with the crappy stock tranny.
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Originally posted by Str8Down You should go ahead nad have the 6 speed tranny put in too. Then you don't have to deal with the crappy stock tranny. |
Originally posted by moehler you'll put much more than 400 hp with 12 psi... hell 6 psi is good for 375 rwph. |
Are you talking to me? I just got that number from what David originally posted :).
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you get 375 because the motor is ported, you have a free flow exhaust, re-worked turbos, free flowing intake, bigger intercooler and a programable ecu
Michael |
Originally posted by TechTrix you get 375 because the motor is ported, you have a free flow exhaust, re-worked turbos, free flowing intake, bigger intercooler and a programable ecu Let's get real for a moment. A ported 13B with all the mods you mention and 10 psi might make 285-290 RWHP, yet a 20B will make another 80+ horsepower at the wheels with 4 lbs. less boost? The 20B is, without a doubt, one of the most over-hyped engines in history. |
Well.....if you take 285 and add 50% for the 3rd rotor you'd get 427rwhp. Then if you take 40rwhp off for the 4psi less boost you'd have 387rwhp.
Sounds about right to me I know of large single turbo 20B's making around 600rwhp on 93 octane.....I wouldnt call that over-hyped at all STEPHEN |
Originally posted by SPOautos Well.....if you take 285 and add 50% for the 3rd rotor you'd get 427rwhp. Then if you take 40rwhp off for the 4psi less boost you'd have 387rwhp. A stock 20B makes 300-320 flywheel horsepower @ 10 psi. So you're saying that it's reasonable that at only 6 psi, it will make ~440 horsepower (375 RWHP with 15% losses) because you added porting, a bigger intercooler and opened up the exhaust and intake? Do you know how absolutely ridiculous that is? I know of large single turbo 20B's making around 600rwhp on 93 octane..... |
Originally posted by jimlab Wait a minute. What time did the train leave Chicago again? . |
jimlab check out this tread over 600rwhp @ 14psi on pump gas dyno sheet included
https://www.rx7club.com/showthread.p...hreadid=293958 |
Originally posted by Fatman0203 :rlaugh: Train A leaves at 10:00 pm at 90mph and Train B leaves DC at 11:00pm at 110 mph, whats the name of the waitress =P |
Originally posted by 20B 3rd Gen jimlab check out this tread over 600rwhp @ 14psi on pump gas dyno sheet included https://www.rx7club.com/showthread.p...hreadid=293958 |
Originally posted by 20B 3rd Gen jimlab check out this tread over 600rwhp @ 14psi on pump gas dyno sheet included https://www.rx7club.com/showthread.p...hreadid=293958 |
Originally posted by jimlab Claire. |
Originally posted by jimlab Nice, was that with the stock twins? :rlaugh: |
I'm so jealous of your ability to afford this project, someday I'll be able to do the same, but damn, I was happy to be looking towards 300rwhp.
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Originally posted by 20B 3rd Gen Funny, hahaha I thought you'd just like to see that it was possible |
Instead of trying to guess and fight over how much power hes going to make, why not just wait and see? You guys worry to much about other peoples cars. Let him post a damn dyno sheet instead of trying to guess.
Jim~Are you saying its impossible to get 600whp on a 20b? I dont see that being a problem at all. Haven't you seen when the guys in japan made little over 700whp on the 2 rotor with that huge turbo? So why can't someone put a huge turbo and big ports and make over 600whp? It's all about the tuning, and I'm pretty sure pettit knows little about tuning. I think your to caught up in the v8 world:) downing the rotors. All I have to say is lets wait and see.:D |
Originally posted by rx7raca Jim~Are you saying its impossible to get 600whp on a 20b? |
Originally posted by Rhode_Dog some people cannot be pleased. :cool: David, good luck on your conversion. I'm sure you'll be very happy with the end result, and we're all looking forward to seeing pictures of your project. |
Originally posted by jimlab The 20B is, without a doubt, one of the most over-hyped engines in history. soudn like ltos of fun david no box ye i will go loko tommrow see if they left me a note to go pick it up :) joel |
Originally posted by jimlab The Cosmo 20B made approximately 300-320 flywheel horsepower (officially rated at 280 ps, the Japanese limit) @ 10 psi. How do you get 375 RWHP from only 6 psi? http://www.jgtc.net/race/2004/04team/04tm007en.htm |
Wow,
Didn't know that I would create this much controversy with my post. The Pettit conversion leave very little as stock. The engine is totally reworked, doweled, and ported. The intercooler is changed, and Pettit uses and tunes and aftermarket ECU. Pettit's "stock" turbos are also totally reworked including ceramic coating. So, the Pettit 20B will be no stock Cosmo engine. Pettit claims 500 - 550 horsepower from this setup. I guess you can do the math to take this down to RWHP. The figure I qouted was from Cam and his 20B car. He gave me a ride in it and I checked the boost he was using during the ride (between 6-7 lbs.). Cam stated the RWHP figure I wrote about. It's all pretty irrelevent though. I'm a big dyno guy - this is the only way to really know horsepower and torque. I'll definately post these so you can see what the true numbers are. FYI - What I am shooting for is not the highest amount of horsepower I can make, it's the highest amount of "reliable" horsepower. I'd be very happy with 375 to the wheels and it be reliable. |
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