Stock Bottom 4.8L w/88mm (Not a Typo)
09-20-2013, 09:34 AM
#21
mph at the track seems weak for 21lbs of boost = approx 800whp + nitrous? dare i say only 137-139mph
i wonder how it will do with your 1000hp setting next outing
other than that, awesome for pushing the 4.8, i just cant help but always feel like some dynos are happy haha, no to take away any of your efforts.
i wonder how it will do with your 1000hp setting next outing
other than that, awesome for pushing the 4.8, i just cant help but always feel like some dynos are happy haha, no to take away any of your efforts.
09-20-2013, 11:06 AM
#24
mph at the track seems weak for 21lbs of boost = approx 800whp + nitrous? dare i say only 137-139mph
i wonder how it will do with your 1000hp setting next outing
other than that, awesome for pushing the 4.8, i just cant help but always feel like some dynos are happy haha, no to take away any of your efforts.
i wonder how it will do with your 1000hp setting next outing
other than that, awesome for pushing the 4.8, i just cant help but always feel like some dynos are happy haha, no to take away any of your efforts.
Regardless, very cool that its being done on a stock bottom. Keep rockin it and see how far you can go. How high are you spinning it?
09-20-2013, 11:12 AM
#25
we have a 4000lb firebird too, and on 17lbs with a 80mm it went 137 and the car dyno's 650ish
but i do agree if he isnt hitting full boost till later down the track that would play on the trap.
trust me i love the 4.8 underdog motor
but i am also a huge skeptic of the internet lol
but i do agree if he isnt hitting full boost till later down the track that would play on the trap.
trust me i love the 4.8 underdog motor
but i am also a huge skeptic of the internet lol
09-20-2013, 12:12 PM
#28
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mph at the track seems weak for 21lbs of boost = approx 800whp + nitrous? dare i say only 137-139mph
i wonder how it will do with your 1000hp setting next outing
other than that, awesome for pushing the 4.8, i just cant help but always feel like some dynos are happy haha, no to take away any of your efforts.
i wonder how it will do with your 1000hp setting next outing
other than that, awesome for pushing the 4.8, i just cant help but always feel like some dynos are happy haha, no to take away any of your efforts.
we have a 4000lb firebird too, and on 17lbs with a 80mm it went 137 and the car dyno's 650ish
but i do agree if he isnt hitting full boost till later down the track that would play on the trap.
trust me i love the 4.8 underdog motor
but i am also a huge skeptic of the internet lol
but i do agree if he isnt hitting full boost till later down the track that would play on the trap.
trust me i love the 4.8 underdog motor
but i am also a huge skeptic of the internet lol
With that being said:
-I updated the original post to clarify that I only used N20 to spool for the first 60' or so on the two passes.
-I don't know what you are implying about a happy dyno but it is a legit dyno and I was very happy!
-It is a slow spooling setup and full boost is not see till later as I posted.
-I would estimate the race weight around 4100lbs that day.
-If you care to further critique my data, go take a look at my original build (linked at the top of this thread) and compare numbers. At 8lbs it made 675/728 and at the track with 9lbs I ran a 10.5@135. At 13.5 lbs it probably made around 800rwhp and trapped 141. Keep in mind the 408 made quite a bit more tq than this setup. I would say the numbers are right in there in comparison.
-Weather permitting we will see more track numbers in one week.
09-20-2013, 12:38 PM
#29
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2001 OR 2002
It seemed to be spooled by about 5krpm
.I thought the same thing until i saw his weight.. hes 4000lbs. Not many people are pushing heavy setups like this, so im not surprised by the mph, especially if its not spooling very quickly
Regardless, very cool that its being done on a stock bottom. Keep rockin it and see how far you can go. How high are you spinning it?
Regardless, very cool that its being done on a stock bottom. Keep rockin it and see how far you can go. How high are you spinning it?
CircleD Trip Disk, they estimated 3400 stall for my setup.
09-21-2013, 03:49 PM
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Sweet!
I wanna see the 1000rwhp go down the track tho, dyno numbers are cool but mph is much cooler lol! There is no reason why you cant get the car to leave hard with that turbo, plenty of guys running 88mm turbos on 4.6 mod motors. Unless it is strictly a street car.
I wanna see the 1000rwhp go down the track tho, dyno numbers are cool but mph is much cooler lol! There is no reason why you cant get the car to leave hard with that turbo, plenty of guys running 88mm turbos on 4.6 mod motors. Unless it is strictly a street car.
09-25-2013, 12:37 AM
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Great numbers bud! looks like the ring gap is the key and the rods can handle it on the early style. Get it to the track though and make sure your safety equipment is in check first. 