The lag is coming from the turbo, the turbo it self. Sorry but after all these mods you should of been 11 sec car. Shiv stage 1+ cars do 12.1~12.2 all day long. I am sorry but If I were you I would call BR and ask them what the hell is going on( serious). NO BS

 

I feel for you really. Because you spent some serious money, when my turbo lagged 1000 rpm after stock first thing I did got on the phone with ATP and asked them what is going on?? They told me to give it 1 week and replace my cat with test pipe and guess what now I hit 23 psi by 4050 RPM.

 

I am by no means an expert here, so if someone knows more about this than me, feel free to chime in.

Octane is a measure of a fuel's resistance to detonation. The higher the octane value, the slower burning the fuel is. With slower burning fuel, you'll need to fire the spark plug earlier, hence more ignition timing, to burn off the fuel efficiently. More timing = more power up to a certain point.

Lead is a main ingredient for resistance to detonation. This is why all the old muscle cars were able to run 13-14:1 compression ratios. That's why all the leaded race gas starts at 110 octane ratings and go up from there.

On DSMs, cars running C16 typically run ignition timing in the 23-25deg range under boost. Whereas on pump gas, depending on octane, ignition timing is usually in the 16-18 deg range under boost.

 

You make it sound like it's so easy to run 11s. Just throw the parts together and it'll go fast, right? There are a lot of fine details that go into making a car fast. I agree, that after spending a boatload of $$$ at a shop, that it should come out optimally tuned. But part of the modding process is also the troubleshooting process. His car can and will run 11s. He just needs to get the bugs worked out.

 

DOn't get me wrong here bro. I am no expert was not saying that you were wrong or anything else. I was just speaking from what I've seen.

 

 

I did not try to make it sound bad or good. I have nothing against the guy or BR or anyone here. Turbo spool up is something you can't change much if you have all the supporting modes like he does. His turbo might get about 200 better spool once its fully broken into but he is lagging till 5000 rpm . What bug that needs to be fixed there that will shave 1000 full RPM, gata be a HUGE bug. All I am saying that BR said it wont lag that bad right? Then call them and ask them how did you guys get these results. They will have the answer.

 

and YES it's easy to run low 12 on our EVOS buy stage 1+ and you are done. how hard that could be.

 

How hard could it be? For stage 1 mods, there aren't that many variables to play with so there aren't that many things to troubleshoot. On evo8power's car, he changed his turbo and is getting more lag than he should be getting from the way he described. So there's an issue right there. We all know than a BR500 *SHOULD* be running 11s, but why isn't it? Being able to diagnose his issue here would be beneficial to everyone who chooses to go down a turbo upgrade path so they'll know what to and not to do.

 

Ok I am being beneficial now. CALL BR.

 

I was just driving around Tampa with Al tuning my car and he told me something about this particular turbo kit. Al said that he thought the guy's blow off valve was not properly adjusted and was leaking off boost. He said this guy is using a forge bov and that it comes with 4 springs and you have to find the right spring to match the kit. Al said he drove the BR 580 and it had zero lag when shifting at red line. Al also said that he though the MAF was an almost zero respriction and cause of lag, so I guess this is a rare time that he and Shiv agree on something!

Seems that this guy should try and play with the various springs on his bov to get a tighter spool up.

 

he should also get cams if he doesn't have any and a S-AFC to lean out the A/F ratio when using racegas

 

im running the hks 272 cams. the stock bov is on know and thats qwhat i had at the track.......it hold perfect to 26 psi at the track all night.......the only two things i coudl think off are these....

stock upper intercooler pipe
hks racing suction kit modified to fit turbo...and it tappers to 2.25' , the buschur tapers to 3'

i might try and change those 2 variables in the near future and see what happens. also wathcing the video of the runs....in between shifts i am VERY slow.....i need to work on that deffinately......even roling on the highway in 4th and flooring it, it seems to take to 5000 every time to spool......i smoked a 10th aniv. cobra and s4 t/t but i know it can go way faster.....even 11.9 i think are deff. in reach.....i mean i had a 1.7 60ft so i know i got rid of the lag of the launch know its juast between gears i need to work on....anyone know of any BOV that arent interchangable and just come with one spring and your done?? thanks guys!

 

just spoke with Al on the phone and he said using c16 will noe hurt the flash.....

 

I think 264's on the exhaust side would help ur spool up time and keep ur 272's on the intake side. Whats the AR size on the exhaust side?