I said "without alky, race gas, OR NITROUS."


I said "the stock 03 turbo."

 

I thought he was running a GT35R

 

good sunoco 93 pumpgas, 30* ait temps after the FMIC , good tuning. This is spiking to 26psi, settling down to 21psi by 7500rpm. I haven't had a bottle in the car since may. I have made about 25 wot pulls with this tune in the EMS an it's real consistent 385-390whp peak at ~6000rpm. seeing 380ftlb.

for comparason, I was getting 460-470whp on the GT35R that I just took off the car, on the same pumpgas in slightly hotter weather at 26si. With that turbo I only made 2 passes and went 120mph missing 4th gear at 23psi making about 430 on the aem logger. (pass in my sig)


I get that 117mph expected trap by overlaying actual drag run datalogs with my street pulls showing rpm, whp in 3rd gear. on my of my drag runs that show 116-118mph I see between 380 and 400whp (be it br440/nitrous, br440 in winter, or gt35r on pumpgas/low boost).

I think it's the insane low AIT temps that are making the power and allowing an aggressive tune. Im working on a screenshot with some info FYI.

Graph shown below is one of the better peak #'s. There is a missfire at lower rpm when the boost spikes (damn near 27psi spike). As I said before..on actual 116-118mph runs at the dragstrip with other part conbinations the logger shows 380-400whp. Now Im making 385-395 with a better overall powerband that should be easier to drive. Should trap atleast 117 if not better becuase of the better powerband/area under curve.

 

 

I wasn't questioning the 117mph trap guess. In fact, I would expect 118-119 with that power, but I have never heard of any 9.8 hotside making 390whp on straight pump gas. I'm not sure how you can run 26psi on pump gas even with the cold temps. It would have to be some sort of world record, wouldn't it? People can't make 390 on TMEs, WRs, and 10.5s with your mods even on alky or race gas sometimes, so it certainly makes no sense that you'd make that much on pump gas. Oh well, might as well go ahead and hit the 117-118mph on pump and shock the world.

 

I don't know what to tell you, other than it's going to be a while till I can make more track runs, as all the tracks are closed for winter. I missed the last weekend 2 weeks ago while I was putting new HG and new clutch in.

The AEM math I use to calculate hp and torque is accurate +,- 5whp when compared to Turbotrix's awd dynojet. when I first started using it, I ran the car on the street many pulls on way to dyno..most showing between 348 and 355whp. Ran 5 pulls on dyno...351whp was best pull on pumpgas. on same map as dyno...It made the same on the street again. Im confident in it enough to use it for simple trap speed comparason as well as a rough guestimate on what the car would do on TTR's dynojet.

Maybe the tune is ragged edge? I personally don't think so, but if it blows up...whatever, I can fix it.

 

wrong

 

Well, that's what you told us. You went 11.8 at 114.5, then asked for advice on cam gear settings, then came back later and ran 119+ with the new settings. Which part was wrong? I'm only repeating what you've told us. If you left something out, I can't read your mind.

 

Since you have a hard time reading. I went 11.6 @ 117 that day with my old cam gear settings (+3,+1) and then went 11.5 @ 119 when I changed them to -4,-1.5. Understand now?

 

I never knew the +3/+1 was your "old" setting. I just thought it was another new setting you tried, since it was .2s and 2-3mph better than your previous trip. I thought you then switched a 2nd time to the -4/-1 en route to the 11.5@119. So, what changed between the 11.8@114.5 and the 11.6@117?

 

Warr,

You need to update your signature

 

Done!

 

Nate,

How do you calculate the WHP on the AEM, i would like to know this? Also did you have to resynch your timing when you made the cam gear changes? Glad to see you back with the stock turbo .

 

Resynced the timing 3 times just to b sure, but didn't make any change to the synch #. The crank sensor is used for the actual timing degree, and the cam sensor is just there to sync up TDC. you can move the cam sensor around but the ign timing stays the same.

I have a math program that one of the smart guys on the EMS forum wrote. you have to input vehicle weight, tire size, gear ratios, CD, and frontal area. It calculates hp and tq by rate of engine speed accelleration. basicly same way a dynojet calculates power, but instead of accellerating the wegiht of the roller, were accellerating the known weight of the car.

http://www.diamondstarmotorsport.com/AEM/Evo8dyno.mth
Here is the math program, already set for Evo8 3rd gear ratio.

right click and save it to your hard drive. Open up AEMlog. Open a log with a 3rd gear WOT pull. pull down math, open the math file. It is set up for 3rd gear, 4000lb, stock tire size (235 45 17). If your weight or tire size is different, select edit library and change the value (but leave the + signs and stuff alone).
after it calculates, you have to select the top 2 parameters to look at on the log _wheel_hp and _wheel_tq. Oh yeah. it has to be an internal datalog with RPM logged on the fastest speed at the fastest rate(2min datalog). If it's not th 255b/sec RPM log rate, the dyno math won't work right.

pretty simple.

 

Nate,

Thanks for the info. I will give it a try in a few.