Quickest DSM w/ Stock Exhaust

[asd_gst]

yes i second that lets see a video or a time slip and i would like to see pics of this "stock" car

[dsm-onster]

well I ran a 13.5 with a FWD and stock intercooler and fuel with the stock 14b at the edge of fuel cut which for my car was about 15 psi. the 16g can do better at the same boost as the 14b because of the larger turbine housing, but 10psi does SEAM a little far fetched.

[asd_gst]

what was done to the car besides stock intercooler and fuel and turbo? slick? tranny? im just curious

[dsm-onster]

Stock fuel, but my fuel pump was rewired. But I had 225 tires. Street radials. Lot's of logging, lots of seat time, and a hacked 1g maf. No exhaust. I ran the exhaust cam retarded 1 tooth and it helped. Spool came in all at once so I could make better time shifting earler than 6500rpms. I swapped to a 7cm^2 turbine hosing from a blown 16g and hit fuel cut at 5K. That's how I know I was VERY close to fuel cut with my setup. The hacked maf helped lean her out a little plus it added some timing. I lost mph advancing base timing at the cas. If I had an safc, she could have done a little more, I guess. But, I never knew my a/f ratio because I wasn't logging a wideband.

I'll tell you this: dropping the exhaust helped tremendously through out the rpm range it widened my powerband.

[ARFWD]

Originally Posted by dsm-onster

well I ran a 13.5 with a FWD and stock intercooler and fuel with the stock 14b at the edge of fuel cut which for my car was about 15 psi. the 16g can do better at the same boost as the 14b because of the larger turbine housing, but 10psi does SEAM a little far fetched.

What was your MPH on that run?

[asd_gst]

Originally Posted by dsm-onster

Stock fuel, but my fuel pump was rewired. But I had 225 tires. Street radials. Lot's of logging, lots of seat time, and a hacked 1g maf. No exhaust. I ran the exhaust cam retarded 1 tooth and it helped. Spool came in all at once so I could make better time shifting earler than 6500rpms. I swapped to a 7cm^2 turbine hosing from a blown 16g and hit fuel cut at 5K. That's how I know I was VERY close to fuel cut with my setup. The hacked maf helped lean her out a little plus it added some timing. I lost mph advancing base timing at the cas. If I had an safc, she could have done a little more, I guess. But, I never knew my a/f ratio because I wasn't logging a wideband.

I'll tell you this: dropping the exhaust helped tremendously through out the rpm range it widened my powerband.

stock downpipe still? i dropped my exhaust once just had stock downpipe open, but car was running bad due to knock sensor and o2 were bad, i think i might take it off again tonight

[dsm-onster]

101.54mph. No exhaust. No down pipe, nothing. Just o2 housing. The o2 housing outlet faces away from the alternator .

[asd_gst]

oh ok i see

[ARFWD]

So I just got back from the track this weekend. i was on the hunt for 12's but I didn't get it. I am going to try and hit 12's with the stock downpipe back exhaust and all the stock intercooler pipes off a 1G. I will start off by saying this car needs a lot of work. The 4 bolt howls, I am running a 90 single syncro trans, and the engine compression goes from 75 to 115 on the high side. This is at a 4500ft elevation so the numbers are roughly 25-30psi per cylinder lower than most of what you guys see. So I managed a personal best time of a 13.3 @ 100.9 MPH with a 1.778 60ft time. I was having problems with boost all day and ould not get it right where I wanted. I was able to keep the trap speeds 100 mph after the 13.3 run but could only get a best of a 13.5 to back everything up. I am getting together a beter engine so the car should run a lot faster. I want this 12 sec time slip on most of majority of the stock mitsu parts no nitrous and 100 octane pump gas.

[talon187]

Im going for 11s...ive got a pte57 trim huge 02 hosuing full apexi exhaust twin disk clutch built trans ported 2g exhaust manifold with a tial 38mm on it and a full bushur race core with a tail bov and a eagle wesico motor with arp everything and mitsu 4 layer head gasket. and a custom intake manifold with a 75mm throttle body the head is totally stock. im running like 23ish psi on pump im using a maf pro im almost tempted to put a jdm intake manifold on and a stock throttle body but i dno think i could hit 11s? im alittle neverous on geting it out of the hole because i just broke a rear axle and replaced it dont want to do it again. i doubt i could find another one lol. stupid 3bolts

[ARFWD]

You say that you have Apexi exhaust thats not what we are talking about here in this thread. I am talking about keeping the stock downpipe, cat, and catback exhaust.

[wancsta]

Well ide say your best bet would be to unbolt the downpipe and swing it to the side then you'll still be running your full stock exhaust otherwise I don't really see a point to this. You will probably just end up burning something up imho but to each their own

[jusmx141]

Here it is, a 12-second pass with the full stock exhaust:



The stock downpipe was repaired where the OEM flex section broke out, but it was replaced with a section of 2.25" piping and a new flex....all are the same size as stock. The stock cat is in place and not gutted. The 1G 6-bolt has somewhere around 180k on it and has never been disassembled.

[dsm-onster]

There was a dump tube. Was the stock o2housing used? It's hard to see it in the video.

Reinserting the wastegated exhaust gases disrupts flow a LITTLE bit. Well a little more for a turbo that isn't being pushed hard. More gases are gated and disrupting the flow out the turbine wheel.