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  Topic Review (Newest First)
March 1st, 2016 09:15 PM
Darwin You need to datalog your passes to find out what you or the car is doing and how it effects the ET and MPH. No more guessing if you have the tools to look.
March 1st, 2016 06:45 PM
GBPackerFan I think the dyno is being generous...trap speed tells you how much power you are making. I personally do not think you are making the power that sheet says you are.

What dyno was it? What correction is it? Who dynoed it?

Trap speed is king when it comes to power.....
March 1st, 2016 12:57 PM
07 Boss
Quote:
Originally Posted by BIGCHRISS197 View Post
I think he lacks the hp and mph to really benefit from a 28" and hes bringing the 4.10s down quite substantially. I say keep working with 26" but move to a bias ply tire.
Quote:
Originally Posted by 4vGts View Post
Isnt it usually the opposite tho?

---------- Post added at 05:23 PM ---------- Previous post was at 05:19 PM ----------



The car makes 345whp on the dyno. Just trips me out that bolton cars trap higher
It's all about the whole combination. You may go faster with the smaller tire, you might not. You may go faster with the big tire, you might not. There is more to getting down the track than just HP. You have to find the right combo that works the best for you.

When your comparing yourself to other cars it's not an apples to apples comparison. Peak power numbers don't mean squat. Shape and size of your torque curve determines how much power you really have. That 345 hp is just a snapshot of your power curve. I can beat a 345 hp car with a peaky power curve, with a 300 hp car with a broad flat torque curve. it's all about usable torque within a certain rpm range that will determine how fast you are.
February 29th, 2016 09:23 PM
4vGts
Quote:
Originally Posted by 07 Boss View Post
There you go. Run the MT's and watch your trap speed increase.
Isnt it usually the opposite tho?

---------- Post added at 05:23 PM ---------- Previous post was at 05:19 PM ----------

Quote:
Originally Posted by BIGCHRISS197 View Post
I think he lacks the hp and mph to really benefit from a 28" and hes bringing the 4.10s down quite substantially. I say keep working with 26" but move to a bias ply tire.
The car makes 345whp on the dyno. Just trips me out that bolton cars trap higher
February 29th, 2016 08:53 PM
BIGCHRISS197 I think he lacks the hp and mph to really benefit from a 28" and hes bringing the 4.10s down quite substantially. I say keep working with 26" but move to a bias ply tire.
February 29th, 2016 07:13 PM
07 Boss
Quote:
Originally Posted by 4vGts View Post
Im running a 26" tall nitto nt05r
I have ran a 28 tall mickey thompson and that one netted highest mph 107

There you go. Run the MT's and watch your trap speed increase.
February 29th, 2016 05:13 PM
4vGts
Quote:
Originally Posted by 07 Boss View Post
Have you thought about trying a bigger tire? I gained in my ET going to a smaller tire but I lost on my trap speed. Used to do 117-118 with the 29" tires. On my 28's I run 116-117 but like I said, my ET is quicker by a tenth or two.

And I don't see anything as far as suspension mods. What tire are you running?
Im running a 26" tall nitto nt05r
I have ran a 28 tall mickey thompson and that one netted highest mph 107
February 29th, 2016 12:30 PM
lindertw from other threads...

Quote:
Originally Posted by 4vGts View Post
Also added some suspension upgrades wont get into that right now
Quote:
Originally Posted by 4vGts View Post
Yea my car is heavy to. Full weight premium with shaker just spare tire and jack removed. I need to weigh it tho.
Quote:
Originally Posted by 4vGts View Post
yeah i need to run lighter tires. Ive been running 34lb 19 inch 2010 gt500 wheels and 285/35/19s out back.
- what suspension work has been done, and how is it configured?
- remove as much weight as you can, every little bit helps with an N/A car (shaker sub/amps, pass seat, rear seat back/bottom, front sway bar, etc. it all adds up).
- those heavy wheels and low profile tires are doing you zero good at the drag strip
- what RPM do you launch at?

Quote:
Originally Posted by 4vGts View Post
But how am i running so much slower these times are on the same days as others bolt on 3vs running 110. I havent driven one but they pull on me after the 1/8 mile
maybe they have their suspension/tires dialed in for the track?

my first 1/4 mile pass back in the fall of 2013 (right lane in time slip pic) I had UCA/LCA,LCA relo brackets, cobra jet springs, strange single adj struts/shocks, 17" m/t bias ply rear tires on OEM wheels and a gutted trunk. K&N CAI, frpp shorty headers, OEM h-pipe with cats, steeda UDP, 93 dyno tune putting down 302rwhp/317rwtq on a dynojet

February 29th, 2016 12:24 PM
07 Boss Have you thought about trying a bigger tire? I gained in my ET going to a smaller tire but I lost on my trap speed. Used to do 117-118 with the 29" tires. On my 28's I run 116-117 but like I said, my ET is quicker by a tenth or two.

And I don't see anything as far as suspension mods. What tire are you running?
February 29th, 2016 10:22 AM
4vGts
Quote:
Originally Posted by Bullitt95 View Post
I don't think so 'cause his engine isn't lacking for power with 346/325.



Could just be the air, maybe a strong headwind, and the DA does make a big difference.
That said, most of the power is concentrated above 3500rpm so he may need to launch at higher rpm to get away quicker. Having 4.10s in the rear also means he has to shift into 4th before the 1/4 mile trap and that could also be slowing him down.
Well i had 373s before but ran thru 3rd gear same mph 105-106
I am crossing the traps in 4th at almost 6k now. But how am i running so much slower these times are on the same days as others bolt on 3vs running 110. I havent driven onebut they pull on me after the 1/8 mile
February 29th, 2016 03:32 AM
Bullitt95
Quote:
Originally Posted by BIGCHRISS197 View Post
Hmmmmm maybe the tune? Could be super conservative or cam timing retarded.
I don't think so 'cause his engine isn't lacking for power with 346/325.



Could just be the air, maybe a strong headwind, and the DA does make a big difference.
That said, most of the power is concentrated above 3500rpm so he may need to launch at higher rpm to get away quicker. Having 4.10s in the rear also means he has to shift into 4th before the 1/4 mile trap and that could also be slowing him down.
February 29th, 2016 02:22 AM
BIGCHRISS197 Hmmmmm maybe the tune? Could be super conservative or cam timing retarded.
February 28th, 2016 11:58 PM
4vGts everywhere lol

1.9 60'
82 mph 1/8
105 mph 1/4
February 28th, 2016 11:52 PM
BIGCHRISS197 Heres an old slip on a 50 shot. compare to yours and see where youre losing time and mph.
February 28th, 2016 11:44 PM
4vGts exactly makes no sense. Im getting super frustrated. I know its not my driving because that 99 cobra i drove today i went faster then my friend in his own car....
February 28th, 2016 11:39 PM
BIGCHRISS197 Hmmm idk man thats a pickle.
February 28th, 2016 11:24 PM
4vGts i always run mine out to 6700 rpms
My peak power is 6300 dyno was 345whp on a dynojet. Im about to go back to stock cams. i was running 13.2 to 13.5 with just intake tune h pipe. lol
February 28th, 2016 11:16 PM
BIGCHRISS197 Take video of your next run inside the car. Before i did i didnt realize i was shifting too early and was coming out of my power band. Make sure youre running the rpms out to 6700 or higher. Heres my video for reference, you can hear the bog in 3rd.
https://youtu.be/4jLWZslQS2g
February 28th, 2016 11:10 PM
4vGts
Quote:
Originally Posted by Darwin View Post
1.9 60' 12.8 @ 109 on stock rims, tires and stock converter
UDP
127200
LCAs
C&L street CAI
Lts
O/R X
Stock Muffles
CMDP
4.10's

Tune was from Brenspeed.

It ran like a bracket car, solid all day long.


You might need to data log to get someone to look it over


i Just ordered a tune from brenspeed today. lol Hopefully they can get it to me before next week. It doesnt feel like it runs slow but it is lol

---------- Post added at 07:10 PM ---------- Previous post was at 07:09 PM ----------

Quote:
Originally Posted by BIGCHRISS197 View Post
Auto or manual?
all 5 speed manuals.
February 28th, 2016 11:08 PM
BIGCHRISS197 Auto or manual?
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