stockport NA in the 13's!
04-03-03, 10:04 AM
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stockport NA in the 13's!
https://www.rx7club.com/forum/showth...84#post1642584
Finally made it! 13.96 @ 97.12mph
It takes a bit of effort, but it is totally possible. I have a bit of tuning left in it and a lot of weight reduction that is possible.
Mods are listed in the other thread. The pass was made last night at a certified IHRA track.
Finally made it! 13.96 @ 97.12mph
It takes a bit of effort, but it is totally possible. I have a bit of tuning left in it and a lot of weight reduction that is possible.
Mods are listed in the other thread. The pass was made last night at a certified IHRA track.
) I am very interested in your Fuel pump and regulator setup. SHoot me an email would ya?
04-03-03, 10:33 PM
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Knight-
It's all about putting on parts that bang for the buck and then tuning it properly.
Carter fuel pump, Holley regulator, filter(s) and a good fuel pressure gauge. Set the fuel pressure at idle and make sure it is still there at 8500rpm in 3rd gear. Most people only check it at idle, which means very little.
This is really an autocross car. Racing Beat sway bar, Suspension Techniques springs and Tokico shocks.
It's all about putting on parts that bang for the buck and then tuning it properly.
Carter fuel pump, Holley regulator, filter(s) and a good fuel pressure gauge. Set the fuel pressure at idle and make sure it is still there at 8500rpm in 3rd gear. Most people only check it at idle, which means very little.
This is really an autocross car. Racing Beat sway bar, Suspension Techniques springs and Tokico shocks.
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04-04-03, 01:08 AM
#8
200+ fwhp.... :O
its carbed I notice.
perhaps a silly noobish question here, but is carbing the only way to get more fuel/air mixture into the motor? is there a fuel injected way to serious power on a 13b?
its carbed I notice.
perhaps a silly noobish question here, but is carbing the only way to get more fuel/air mixture into the motor? is there a fuel injected way to serious power on a 13b?
04-04-03, 03:42 AM
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Originally posted by thorin
200+ fwhp.... :O
its carbed I notice.
perhaps a silly noobish question here, but is carbing the only way to get more fuel/air mixture into the motor? is there a fuel injected way to serious power on a 13b?
200+ fwhp.... :O
its carbed I notice.
perhaps a silly noobish question here, but is carbing the only way to get more fuel/air mixture into the motor? is there a fuel injected way to serious power on a 13b?
You don't necessarily have to spend big money though. A good way of doing it is to run an IDA Weber manifold topped off with IDA style throttle bodies. Fairly cheap and easy to setup and will **** over any carb system.
04-04-03, 04:47 AM
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hmm, does a stockport 12a with turbo count, if so I should be in the 13's soon I hope, very very high 13's but there none the less, with some luck and maybe a prayer, and even then I am not sure, guess there will only be one way to find out
04-04-03, 07:34 AM
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Thanks!
thorin-
Not dyno'd but mathematically it is in the 205hp range at the flywheel. Nothing spectacular.
The best current way to get air/fuel to the engine is with a stand alone ems, aftermarket manifold and throttle body(s). Most people go carb'd due to economics.
The manifold and carb I am running is a used off the shelf Racing Beat Dellorto setup. The jetting is Racing Beat standard 13B spec. I got the entire setup for $225 a few years ago. It is cheap, light and reliable. Rebuild kits are cheap and plentiful.
This isn't meant to reopen the carb vs efi debate for the thousandth time but...... a carb can be tuned for the same maximum horsepower as efi, given equal intake tract flow characteristics. Efi can be perfectly tuned over the entire curve, giving a better powerband and drivability. As it applies to my car, spending $2k on a real efi system vs the way the Dellorto sits right now, it would pick up only a few tenths of a second in the 1/4 mi at best. For less than $2k I can add a blow through turbo system.
Aftermarket carb vs stock efi? No contest, I'll take a Holley, Webber or Dellorto over stock. Just to give you an idea, this motor is still pulling at 9500rpm(which 'accidentally' happens at the autocross more than I like to admit). At the 1/4mi track I shift at 8200-8500rpm depending upon what gear it is. I haven't seen a stock efi'd car that has good upper end power, which is where NA rotaries generally make power.
It's all about bang for the buck.
thorin-
Not dyno'd but mathematically it is in the 205hp range at the flywheel. Nothing spectacular.
The best current way to get air/fuel to the engine is with a stand alone ems, aftermarket manifold and throttle body(s). Most people go carb'd due to economics.
The manifold and carb I am running is a used off the shelf Racing Beat Dellorto setup. The jetting is Racing Beat standard 13B spec. I got the entire setup for $225 a few years ago. It is cheap, light and reliable. Rebuild kits are cheap and plentiful.
This isn't meant to reopen the carb vs efi debate for the thousandth time but...... a carb can be tuned for the same maximum horsepower as efi, given equal intake tract flow characteristics. Efi can be perfectly tuned over the entire curve, giving a better powerband and drivability. As it applies to my car, spending $2k on a real efi system vs the way the Dellorto sits right now, it would pick up only a few tenths of a second in the 1/4 mi at best. For less than $2k I can add a blow through turbo system.
Aftermarket carb vs stock efi? No contest, I'll take a Holley, Webber or Dellorto over stock. Just to give you an idea, this motor is still pulling at 9500rpm(which 'accidentally' happens at the autocross more than I like to admit). At the 1/4mi track I shift at 8200-8500rpm depending upon what gear it is. I haven't seen a stock efi'd car that has good upper end power, which is where NA rotaries generally make power.
It's all about bang for the buck.
04-04-03, 11:48 AM
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The engine is stock. Never opened up or rebuilt. It has somewhere around 100k miles on it.
Since we opened the carb/efi can of worms, here's another. I removed the 6 port valves and actuators. Torque? I don't know. With my regular 205/60-14 street tires, I can idle in first or second gear, stand on the gas and it accelerates rapidly until the tires start spinning somewhere around 5-6K rpm! I admit that the Racing Beat aluminum flywheel has a lot to do with this.
Since we opened the carb/efi can of worms, here's another. I removed the 6 port valves and actuators. Torque? I don't know. With my regular 205/60-14 street tires, I can idle in first or second gear, stand on the gas and it accelerates rapidly until the tires start spinning somewhere around 5-6K rpm! I admit that the Racing Beat aluminum flywheel has a lot to do with this.
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