Acct 23749

Recently took my car to the dyno.


The dyno sheet says 85*f but the actual temp was about 94*f, and at and altitude of 5300' feet thus resulting in a DA of about 8900 feet.

The car has a "safe" street tune

















Vid



and lastly the data file of the dyno:
Hows it look? to much timing?



For the last year, i have been debating selling the maro via parting it out, but this kinda got me excited about it again.
Right now i believe im running the P1-sc at about 41,000 rpm, if i pulley it up to say...61,000 rpm (near its redline) I guess-tim-ate i can make between 11 and 15# of boost. That plus a 12 bolt, street twin, a 2nd walbro, and some 72#/hr injectors with a good dyno tune would put me in the 650 to 770 rwhp range. thoughts?
Should i keep it?





Thanks for looking

boosted-lt1

Very nice power on 6.5lbs! My car made 446rwhp with 7psi, A-trim, no tune. You've got some potential to make a lot more power with a simple pulley change and making sure it gets fuel. I'd keep it!

I know what you mean about get tired with a car. I've had mine for 7 years and rarely drive it to work any more because it just seems like too much pain in the a** compared to a nice, luxurious, daily-driver.

770? I would say more like a 100hp gain if you max the blower.

(6psi x 15hp/psi = 90hp)

-Scott.

Acct 23749

Exactly, I've prolly put less then 2000 mile on it in the last year. its either too cold, too hot, to bumpy, A/c needs fixed, too stressful (whats that noise?), etc etc etc..... lol




on the hp guess for the future, thats why i gave a range. I figure 6.5psi got me just about 200 hp, what would another up to 9psi with an actual dyno tune get me??? Ive read many different estimates on what 1 pound of boost equals in HP, everything from 7hp per pound to 38 hp per pound. 200 hp with 6.5 psi is on the 30+ hp per pound road! we'll see, i doubt its linear, but i cant imagine 650-720hp is out of question.

xxsaint69x

yeah u wont get any where near 700rwhp with a P1SC eheh...pretty good numbers for 6.5 psi though!

Kelly.

you are actually making 376 whp. (those are the UNcorrected numbers.)
the way dynojet does their correction factor for FI cars and altitude is WAY off.

still sounds like a fun car.
id be interested to see what it weighs and what it runs at the track, that will be the true testament to the power it makes.

Acct 23749

Using this post: http://speedtalk.com/forum/viewtopic...90f90fc491e313


I figured my uncorrected numbers were 406 rwhp and with and boost VS high altitude conversion discussed in that topic, my corrected numbers were off by 12%. in other words, by that theory, im making roughly 450 hp if i was at sea level.
ALSO With that A/f ratio, i have bosch 42# injectors running at 104% DC now, and at sea level i consistently maxed out my MAF above 5800 rpm.

All i care really is the same day i put down more then a LT headered c6 zo6 at 480hp, a stock 2005 viper at 405 hp as well as a few other nice cars




Oh and as for the track, id prolly run a 15.xx at 135mph with my weight transfer via a 2.7' 60 foot time lol. its by no means a drag car.

roguedriver

Was that at the last free dyno day? I heard it was a mad house down there. Do you do your own tuning? If so, i'd probably try and see if you can bring your A/F's down to at least 12:1 up to around 5200rpm. Looks a little lean for boost. Good numbers never the less. Just keep in mind that the 12 bolt and street twin are a lot heavier then stock, so you'll lose some rwhp there, but the strength is worth it. I'd keep it.

Ken R.

Acct 23749

yah it was the free dyno day. Crazy, I took them only 3 hours to go through the first 14 ppl, then 7 hours to go through the next 5 lol. and i was like number 20.

I do my own tuning, but do not have acces to my own wideband, i plan on upping the boost and then have it tuned on the dyno.

roguedriver

Have you made any internal engine upgrades or still on stock internals?

Ken R.

Acct 23749

All forged internals with heads and cam and 4 bolt billet mains, built to 900 hp and balanced to 8000 rpm... although i'll never go there lol

roguedriver

What kind of pistons you running? You should be able to run the boost in the teens pretty comfortably, but might be a good idea to pull some timing out of it. Should make some good power too. 10 bolt beware....

Ken R.

Acct 23749

the pistons are forged SRP with a -24cc dish

roguedriver

Be very careful with the SRP's as you up the boost. As you up the boost, make sure your tune is spot on and your getting no detonation. Even in the part throttle tuning. The SRP's don't like that and your ring lands will let you know about it for sure. I just pulled my SRP's and put in some JE's. I cracked the #2 land on both the #2 and #4 piston. Although they didn't look all beat up from detonation, i'm assuming thats what took them out, even though it's weird that they cracked so low on the piston. Also a lot of posting about them on the board here too. Plus, your looking at about a 12psi boost limit on them. The'll handle more occationally, but be cautious.

Ken R.