boost issues
Thread Starter
Instructor
Joined: Apr 2008
Posts: 111
Likes: 0
From: las vegas nevada
boost issues
just tryin to get some help here we have a 2001 corvette with a vortech v2 just took it out to the strip aand with a professional driver had a best time of 13.4 which is stock quarter mile for a ls1 convertible. so what could be causing this its a cog belt and i dont believe the belt is slipping could it be in the tune or could it be an issue with pulley size thanks in advance
Racer
Joined: Feb 2011
Posts: 383
Likes: 0
From: Me
How much boost are you putting in? I ran a 13.4 bone stock, 12.8 with boltons, with a charger u should be mid to low elevens on street tires.. And if ur lucky high tens with slicks.. Check your blowoff vavle to see if you can get boost to even read on the guage.. With a 3.8 probably 8lbs, and a 3.6 should be about 10 psi I would guess.. Keep it simple look at the large things.
That times horrible
That times horrible
Thread Starter
Instructor
Joined: Apr 2008
Posts: 111
Likes: 0
From: las vegas nevada
hook up wasn't an issue i ran the car once myself and only had minor spin at launch . as for checking the blow off how would i go about doing that i am more familar with roots type blowers and turbos. the boost gauge will go up to 13 but i am thinking that it is more reading atmosphereic pressure than boost i will measure the pulleys tomorrow but when the car was built the original owner had issues after install with losing hp he went down 20 hp from stock and took it back and it was supposedly "fixed". and yeah the time was crap i ran a 13.7 with a crap reaction time and jon capps had a best of 13.3 with a .22 reaction time and a 2.155 60'
Thread Starter
Instructor
Joined: Apr 2008
Posts: 111
Likes: 0
From: las vegas nevada
i will have to see if its building boost ive been driving around the camaro and the vettes been sitting i will bring it up on the lift in the morning and check all my fittings
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Safety Car
Joined: Jan 2008
Posts: 4,797
Likes: 52
From: Boise
The one that popped off for me was the one connecting to the intercooler on the passenger side. It was just off enough so it looked like it was still on okay but upon closer inspection it was only sitting next to the intercooler.
I'm guessing something similar happened to you...
I'm guessing something similar happened to you...
Drifting
Joined: Nov 2003
Posts: 1,539
Likes: 3
From: South al
It really could be a # of reasons as to why its not performing well,ur pulley could be spinning on the head unit,no key way ,is the balancer pinned ?check all ur tubing /piping connections & see if all ur clamps are tight,chck ur bov as mentioned or better yet if ur in the cali area ,drop. By & see andy & let him take it for a spin
Safety Car
Joined: Jul 2007
Posts: 4,456
Likes: 29
From: Wichita Falls Texas
hook up wasn't an issue i ran the car once myself and only had minor spin at launch . as for checking the blow off how would i go about doing that i am more familar with roots type blowers and turbos. the boost gauge will go up to 13 but i am thinking that it is more reading atmosphereic pressure than boost i will measure the pulleys tomorrow but when the car was built the original owner had issues after install with losing hp he went down 20 hp from stock and took it back and it was supposedly "fixed". and yeah the time was crap i ran a 13.7 with a crap reaction time and jon capps had a best of 13.3 with a .22 reaction time and a 2.155 60'
Thread Starter
Instructor
Joined: Apr 2008
Posts: 111
Likes: 0
From: las vegas nevada
i will talk to capps about his 60' times he runs nitro funny cars and is just a friend of mine and we have falken azenis 325s on the rear they arent slick or drag radials but they do hook somewhat decent i am taking the car out tomorrow afternoon as we have rain here in vegas today which means random flooding around the house i thought his 60' wasnt so hot as i had a 2.22 in my 95 z28 i am going to measure the pulleys right now but really want to get into the pcm as i think it may very well be an issue with the tune
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
The 60' sucks. I don't care if the driver is John Force. He's not 60'ing your car for ****. I've seen a non pro pull 1.79's on Nitto Invo's
That 60' is murdering your time.
Need to perform a boost leak test by pressurizing the entire system. Smoking it with a good machine would be best if you have access to one.
Something like HPtuners can log the car at WOT and probably tell more of the story.
Bring on the run-on sentences.
That 60' is murdering your time.
Need to perform a boost leak test by pressurizing the entire system. Smoking it with a good machine would be best if you have access to one.
Something like HPtuners can log the car at WOT and probably tell more of the story.
Bring on the run-on sentences.
Melting Slicks
Joined: Apr 2003
Posts: 2,285
Likes: 16
From: Nashville TN
you need to provide a lot more information before someone can even begin to figure out the problem. Start by posting all mods done to the car. 6 speed or auto. Has it ever been on the dyno? If not find one ASAP. Do you have a boost gauge, if so what boost level are you seeing? Boost = more power period.
Even with the horrible 60' time the car should run better than that. Post your timeslip. What MPH did ti trap? BTW it is a lot different launching a pro mod drag car coming off the transbrake on sticky tires than a high HP street car. It takes practice, practice, practice.
Even with the horrible 60' time the car should run better than that. Post your timeslip. What MPH did ti trap? BTW it is a lot different launching a pro mod drag car coming off the transbrake on sticky tires than a high HP street car. It takes practice, practice, practice.
Thread Starter
Instructor
Joined: Apr 2008
Posts: 111
Likes: 0
From: las vegas nevada
sorry for the run on sentences i don't pay much attention when im on my phone
the car was dynoed three years ago at 505hp it is an auto and the only mod is the billy boat exhaust and the vortech v2 with the gorilla intercooler i have seen the boost gauge hit up to 13 lbs im trying to get my hands on hp tuners but i dont start work till mid september and cant really drop 600 on tuning software jeff is to busy at tpe right now to take a look but i may go to garth at leading edge
the car was dynoed three years ago at 505hp it is an auto and the only mod is the billy boat exhaust and the vortech v2 with the gorilla intercooler i have seen the boost gauge hit up to 13 lbs im trying to get my hands on hp tuners but i dont start work till mid september and cant really drop 600 on tuning software jeff is to busy at tpe right now to take a look but i may go to garth at leading edge
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
sorry for the run on sentences i don't pay much attention when im on my phone
the car was dynoed three years ago at 505hp it is an auto and the only mod is the billy boat exhaust and the vortech v2 with the gorilla intercooler i have seen the boost gauge hit up to 13 lbs im trying to get my hands on hp tuners but i dont start work till mid september and cant really drop 600 on tuning software jeff is to busy at tpe right now to take a look but i may go to garth at leading edge
the car was dynoed three years ago at 505hp it is an auto and the only mod is the billy boat exhaust and the vortech v2 with the gorilla intercooler i have seen the boost gauge hit up to 13 lbs im trying to get my hands on hp tuners but i dont start work till mid september and cant really drop 600 on tuning software jeff is to busy at tpe right now to take a look but i may go to garth at leading edge