long term twins build - Page 5 - Pontiac G8 Forum: G8 Forums

parish8 · 12-09-2009, 08:05 PM

got the exhaust done. too much snow to drive it. i am happy with the way it turned out. deep but not loud. free rev sounds killer. putting some 60b injectors to put in the then back to the dyno.

going to try it with the same amount of meth as before and then turn off the meth to see if we can tune it and not run into knock. before we had a hard time at 5psi not getting into knock. then added meth and that took care of things.

http://neufamily.org/images/g8gallery/index_2.htm

It A G8! · 12-09-2009, 11:01 PM

Nice!! Are those turbos water cooled?

parish8 · 12-10-2009, 06:34 AM

Quote:

Originally Posted by It A G8!

Nice!! Are those turbos water cooled?

nope

parish8 · 12-11-2009, 09:47 PM

got to go for a drive today. streets are a mess but i did find one street i could go wot on as long as i left it in 3rd gear.

idle it is deep but not too loud at all. 60mph cruse is quiet. 70mph and the drone sets in. it is about the same as the stock exhaust with the washer mod. wot is quiet and deep. i completely love that sound. engine sounds like a lazy big block but it is pulling hard. boost comes on very quickly. 4psi seems instant.

without dyno numbers i cant say if or how much it has gained. i have been driving around in my 528 for too long so of course it feels fast. looking at the log my injectors are at 100% with the meth running 100%. this is at 9psi. before same boost and meth on full i was at 75%dc but it was 30deg warmer then so it all doesn't mean much.

i am going to put the 60lb injectors in that i have had laying around and then hit up the dyno.

parish8 · 12-13-2009, 09:14 PM

thanks tom at c&s dynoshop. this car is running hard!

before 477rwhp/504rwtq

after 563rwhp/575rwtq

thats 86hp and 71tq by dumping the stock exhaust and going with the dual 3". boost is the same, a/f still low 11's, meth still on full. that is with an extra 2deg of timing at 16deg now. the previous run was at 14deg and gave us 552hp, 14deg is what the timing we ran with stock exhaust.

next plan is to run it to the local dynojet and see what kind of numbers we see there. then as some point toss in this cam i have had laying around.

It A G8! · 12-13-2009, 10:05 PM

TY2185 · 12-14-2009, 05:37 AM

That's Awesome Jim!
Keep up the good work.

95ImpalaSS407TT · 12-15-2009, 05:37 AM

Nothing like turbos, man I cant wait. U have done a great job...

lsxfanatic · 12-15-2009, 09:25 AM

Impressive! Should break 600rwhp on a dynojet.

denmah · 02-07-2010, 04:22 AM

impressive would be an understatement

makes me want to pull the trigger on a single mpt70 for my daily

parish8 · 02-07-2010, 06:11 AM

next round of mods are in. dyno next week sometime i hope.

patrickG spec non dod cam, valve springs, push rods, oil pump, timing chain tentioner, msd boost a pump, CircleD 9.5" tripple disk, tranny cooler.

the car had a significant piston slap sounding noise. i was hoping it was the oil pump. it does seem a little quieter but i need to get it nice and warm to know for sure.

with the back wheels off the ground i was able to get to 2000rpm with just the brakes so it seems decenty loose but at the same time i can move it around the garage at 700rpm.

boost a pump was really easy to install. everything is easy to get too with the battery in the back of the car and the stock pump wires right under the back seat. i did a check on that unit. at 0psi of boost it is at 14volts, 3psi=17v, 6psi=19volt, 9psi=21volts, the unit i got is not adjustable but the setting seems just right. the fuel pressure went from 62psi up to 72psi while idleing with the bap at 21volts.

i dont know if i will get it tuned to 10psi this time. with the hopes of it not breaking anything for a little while i might just turn it up till it sees 600rwhp. enjoy that setting for a little while. maybe it wont break... for awhile.

dyno next week

denmah · 02-07-2010, 07:14 AM

do you know how big the stock injectors are?

BigMike40 · 02-07-2010, 07:58 AM

If you have the time ....can you do the exact same mods to my car

parish8 · 02-07-2010, 09:29 AM

Quote:

Originally Posted by denmah

do you know how big the stock injectors are?

i have heard 42's or 38's, i do have a set of 60's in there now wich i really morel like 73's

parish8 · 02-07-2010, 09:30 AM

Quote:

Originally Posted by BigMike40

If you have the time ....can you do the exact same mods to my car

i would love to, just give me your car for a couple of months and bring a pile of money.

Dulvalius · 02-07-2010, 10:01 AM

Great progress.!!!!! That car is a killer! Man I love the setup and you deff. put alot of hard work into it! the things money and resourses can get you. Have you guys put any octane booster in..maybe get it up in the 98's octane's? How big are those charge pipes? With 200+ hp from turbos alone you might wanna run at least 2.5" - 3 " and get a bigger FMIC??

I cant beleive how much more hp you free'd up by dual 3" exhaust. Keep up the good work man! Would love to see some more vids....inside out side drives etc;!

denmah · 02-09-2010, 05:17 AM

jim, how big is that intercooler you mounted?

i was looking into getting a 31Long 12High 3Ddeep

Silvereagle · 02-09-2010, 09:58 PM

N I C E work Mr. Parish........boy I wish I had the shop, the insight and the knowhow how to do fun stuff like this...........the G8 definitely needs a TT kit available now that APS is gone......who else? ANd at the same time be somewhat affordable for us mortals.

Mike P · 02-09-2010, 10:25 PM

parish8:

I didn't realize until now that you are in Michigan! Cool. I would love to see your twin turbo set up run at a dragstrip......

Are you in the Metro Detroit Area?

We are going to get a nice bit of snow tonight.....

Awesome turbo G8!!!

...

Quote:

Originally Posted by parish8

next round of mods are in. dyno next week sometime i hope.

patrickG spec non dod cam, valve springs, push rods, oil pump, timing chain tentioner, msd boost a pump, CircleD 9.5" tripple disk, tranny cooler.

the car had a significant piston slap sounding noise. i was hoping it was the oil pump. it does seem a little quieter but i need to get it nice and warm to know for sure.

with the back wheels off the ground i was able to get to 2000rpm with just the brakes so it seems decenty loose but at the same time i can move it around the garage at 700rpm.

boost a pump was really easy to install. everything is easy to get too with the battery in the back of the car and the stock pump wires right under the back seat. i did a check on that unit. at 0psi of boost it is at 14volts, 3psi=17v, 6psi=19volt, 9psi=21volts, the unit i got is not adjustable but the setting seems just right. the fuel pressure went from 62psi up to 72psi while idleing with the bap at 21volts.

i dont know if i will get it tuned to 10psi this time. with the hopes of it not breaking anything for a little while i might just turn it up till it sees 600rwhp. enjoy that setting for a little while. maybe it wont break... for awhile.

dyno next week

parish8 · 02-09-2010, 10:35 PM

i am from omaha. i have been up to that track several times but i dont live there. wish i did, thats a nice track.