INTAKES: What do you run or are building?
08-01-2014, 01:08 AM
#91
Race Car
That's pretty low ignition timing. I bet you'd pick up some power up top.
I agree that comparing dyno is a waste of time. On my last runs I'm right around 19-20psi.
Yes Patrick, you need to hit the drags.
I agree that comparing dyno is a waste of time. On my last runs I'm right around 19-20psi.
Yes Patrick, you need to hit the drags.
08-01-2014, 01:24 AM
#92
Rennlist Member
Thread Starter
Sid do you think there's anything to the theory that a strength and quality of spark might have a bearing on how much ign we can put into our motor? I'm scratching my head a bit on the conservative map we run. I know he is careful but I just don't think he is as 'safe' as the differences in advance would have us believe. I'm sure he's tried winding it up but just keeps coming back to where we're at.
08-01-2014, 01:32 AM
#93
Race Car
Nope, as long as it doesn't misfire, it's the same.
I don't know either. I ran similar timing to that map you posted. We then added a bit more advance and gained around 7-10 mph. It's all in my thread from years ago
I don't know either. I ran similar timing to that map you posted. We then added a bit more advance and gained around 7-10 mph. It's all in my thread from years ago
08-01-2014, 01:35 AM
#94
Rennlist Member
08-01-2014, 01:42 AM
#95
Formula One Spin Doctor
Rennlist Member
Rennlist Member
Pat , remember you are road racing , not strip racing , that looks about right @1.5 and running gas and of course your stroke , the rest ,not to worry you guys are in my prayers ....
08-01-2014, 01:48 AM
#96
Rennlist Member
08-01-2014, 02:09 AM
#97
Rennlist Member
Thread Starter
Yep, we're running this stuff. So are a lot of the top tier teams in our format.
http://www.martiniracing.com.au/inde...martinire85116
http://www.martiniracing.com.au/inde...martinire85116
08-01-2014, 02:33 AM
#98
Race Car
Join Date: Mar 2012
Location: Austin TX, drinking beer in the garage
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Just purchased a set of 2001 kawasaki ZX12R throttle bodies. these are the biggest bike throttles you can easily find in sets of 4, bigger even than the hayabusa throttles. These have 46mm butterflies and come as separate castings. They taper from 49mm at the bellmouth inlet to 42mm at the injector site. some modifications will probably be in order, probably cutting them off right at the butterflies and welding on some 45 or 46mm elbows to remove the restriction. Excited to see how this works since people seem to get the heeby-jeebies anytime someone mentions ITB's. They should be in my hands monday. I got the factory injectors, fuel rail, fuel lines, and TPS as well! This will be fun, because it will let me play with staged injectors. The stock ZX12r injectors are I think 30 lb/hr, I might need to figure out how to set them up if I end up running out of injector on my 80#'s. The two sets together should give me enough injector for ~530 rwhp on e85, if my pump can keep up.
Last edited by Dougs951S; 08-01-2014 at 04:40 AM.
08-01-2014, 02:50 AM
#99
Rennlist Member
Thread Starter
Sounds really interesting Doug. Definitely keep posting in this thread with your progress.
08-01-2014, 04:33 AM
#100
Addict
Rennlist Member
Rennlist Member
What tbs are these?
08-01-2014, 09:46 AM
#101
Drifting
Run on Motec M4, race fuel and CDI ignition. Garrett GT3040 turbo. This was not the best pull made. I have a chart somewhere where this car put 462whp on the rollers.
Dreams do come true!
NOTE: The torque loss seen here was due to the bypass valve opening early. I had cranked the adjustment all the way down to the lock nut but the spring in it just couldn't keep the valve closed. This pull was done with the boost set to 1.5bar. The pull we made where it recorded 462whp I layed across the engine and tried to hold my hand over the discharge of the bypass but it forced my hand off up top. Pretty wild.
The owner of the car was happy with what we achieved and after replacing the spring in the bypass and getting it set he had no desire to go back to the dyno just for a sheet of paper. With all the logging we were doing it was not necessary. Too bad though because it would have shown much more than 462.
Poor thread....it was so young.
08-01-2014, 05:08 PM
#104
Rennlist Member
Lets look at this dyno. 462 hp/2.5 bar = 185 rwhp NA approximation
That is about 210 crank NA hp from a 2.5L 8V motor.
The S2 3L with a 4V head was rated at 208 crank hp. Thats with a CR of 10.9:1!
I have looked at a lot of dynos and ran numbers on countless motors and these numbers seem extremely high given the data you provided.
08-01-2014, 05:22 PM
#105
Drifting
Where did you get 2.5bar? You mean 2.5L.
The block was sleeved but it was still a 2.5L because of the class it ran in. He couldn't up the displacement or it would move him up and he didn't want to be there. So we were able to take advantage of a better ring package. Other than that the rest I posted is 100% accurate.
The block was sleeved but it was still a 2.5L because of the class it ran in. He couldn't up the displacement or it would move him up and he didn't want to be there. So we were able to take advantage of a better ring package. Other than that the rest I posted is 100% accurate.