So Billy@Englishracing.net and his teammate ( and owner of the car) GSRMike, have built Mike's car into a few interesting variations over the last 3 years. It has always had stock cams, and until very recently a MAF. On E85 and the 57 trim with stock intake manifold the car made 440whp, switched to the Magnus and made 474.



Eventually the decided to start building the car into a stage rally car. Right now it has only been rally crossed but the bug has bit and they are working on prepping the car.

It is back to a stock turbo, but still has the AMS 3.5" intercooler piping, downpipe and testpipe. Right now it has a stock cat back on it. The decision was made to go to SD and keep it on gas WHILE LEAVING the Magnus on it. It is their decsion and will fit the eventual rally build so of course I was in to see what it would do. I was very surprised to see a stock cam stock turbo VIII make the power it did on pumpgas-



25psi spike on a 10.5cm hotside VIII resulted in 336/310 and has a really flat powerband. There was no loss in low end, the car is very responsive and I am happy to say I was wrong. Leaving the intake on the car was worthwhile even on a small stock turbo.

Here is another car with very similar mods overlayed with Mikes. It has a MAF still but all the other mods including the stock exhaust-



Obviously the SD made a difference but it is interesting to see that boost for boost (I didnt log it on Mikes car but can post the log) that there was an almost 50whp gain between the 2 on a stock turbo with stock cams.

congrats guys

Aaron

 

The change in torque curve is odd. It's not like the curve is shifted equally up or that torque doesn't drop as much or it is shifting the torque curve later. It just flat out raises torque above like 5700 RPM even after the engine looks like it has reached a natural torque peak earlier in the rev range. Very unnaturally looking.

VTEC YO!!!

How did it affect the tune in the 4500-6000 RPM range?

 

MAGNUS v5 FTW, Looks really nice! I like how it didn't lose any spool. What UICP is on the car?

Mikey

 

Between the 2 cars the Magnus took way more timing in the mid range (fits what I have always seen with the Magnus, VE improvement?). I'll put the log up from the Magnus test last night, it has the 4 bar boost plot on it. I was just a little lazy and didnt hook the dyno to the car when I did it

Aaron

 

 

V5 is where it's at!!Luke has been talking about this like a preacher arron great gains thanks for sharing this test..

 

As soon as I saw "on 92" I knew it was you Aaron

 

Luke talks to anything, even a wall I bet...

Mikey

 

Nice comparison JB.

 

It has an ETS pipe.

 

Usually I'd think more air in the chamber means you wouldn't be able to run as much timing but there are those silly factors like exhaust gases getting in the chamber and such that factor in.

Do you have a airflow comparison like in MafHz or something? I would guess that's a better way to figure out if more air is going in the car than before.

 

One of the issues with SD is my MAF data is not comparable. I have often found that the Magnus will allow 3-4 degrees more timing though, my own car when it was a 2.0L would take 9-10* out the top at 29psi and the switch to the Magnus was allowing 12-13*.

Aaron

 

Well if no one has data who am i to question

Nice gains up top looks like this would be a killer drag manifold, seems like it really comes into its own above 5500 rpm.

 

Aaron great work bro,keep up the good work

Mike

 

For clarification, you say the Magnus takes more timing in the mid-range, but the car makes the same power with more timing advance? If timing were not increased, the motor loses power through that RPM range then?

Lots of stuff going on but if VE were improving and it could take more timing, I would expect good gains in power through that RPM range. That doesn't seem to be the case though which leads me to believe something else is going on. How does it affect the AFR from 4500-6000 RPM?

Before anybody gets worked up, I’m not trying to say the manifold is bad or anything. The gains are there and it’s clear it works above 6000 RPM. I’m just interested in figuring out the difference it makes through the lower RPM range. I always hear how the magnus intake “takes” more timing, but it seems more like it “needs” more timing to make the same power and I’m just interested in WHY that is the case.