1/4 mile on built all motor

[Diamondrev]

ok so i went to the track on friday to run my car all out for the first time.. and i got a 17 second 1/4 mile twice. i dont know why...

when i was stock (just intake) i ran a 16.8... why am i running slower now?

I have wiseco 10:5 pistons
Eagle rods
ebay udp
bbp header, exhaust, test pipe..
cai
obx IM
and i eliminated the ac and ps... any input will be appreciated!

 

[rush2252]

Did you compare 60ft times and trap speeds? It could be something as simple as driver error on the reaction time. two tenths isnt huge. I can tell you climate and track conditions or a number of things can see two tenths. Just wait till you start tuning at summer temps and you take it to the track on a chilly mid 40s or 50s night

Kolby

 

[Diamondrev]

this is true. when i ran 16.8 it was in the middle of winter... and it was a hot night friday at the track...
i also had some major wheel hop friday when i launched.. which is weird because i have prothane mount inserts..

but isn't he saying that he did mods and lost time?

yes with a motor build and almost every bolt on for the 420a i can get .. i was expecting some alot better times..

 

[dylan702110988]

time to go boost

any CELs?

 

[rush2252]

but isn't he saying that he did mods and lost time?

Bolting on horsepower is good advertisement. Even if he did mods and that was the reason he ran .2o slower in the 1/4 its feasible. There isnt shit for tuning out there available for the 420a's

Remember one this young skywalker its not about the money you throw at the car its about the time you spend on the tune

As for his slower times it could have been a number of things that I pointed out. Had he dyno'd the car and then did the build and mods and dyno'd it again same temps etc and got less results then yes but there are too many variables involved for .20

Next time you go to the track running some stocks. Throw a pair of 18s on the FWD and see how much slower it goes. Ive seen as bad as a full second in low hp cars

Kolby

 

[Diamondrev]

any CELs?

of course.. no egr or cat..

time to go boost

I know.. i spent 3,000 (engine internals, bolt ons, rebuild costs) in the last year to go this slow! already have my eyes on a turbo kit.

 

[rush2252]

time to go boost

any CELs?

Why dont you just boost it? It looks like the bottom end is going to be capable of it. And if you do your shopping you can probably find a cheap manifold and turbo for around $500.00 you wont have to go huge my buddy boosted his del sol 1.6L w Vtec. Hes running like 8lbs I think on stock bottom end and its insane. If he could ever HOOK hed be in the 12s. He can break em from a roll in 3rd and is running 14's with 118mph trap times go figure


Kolby

 

[Diamondrev]

yeah. at the start of this rebuild i wanted to stay all motor and see what i can get out of it.. i had high hopes, but in the end its just a 420a. i got a built motor, now its time to boost it..

 

[Mr Peepers]

If you're comparing engine mods then compare trap speed, since it is what is mainly affected by power and weight. The trap speed is what determines the potential ET. ET is greatly affected by traction and can be vastly different between runs.

 

[viperlp01]

Jeez all that money for a 17 sec 1/4... people spend 500 and go into the 12s... You need to learn how to launch the car. You do not want to spin. Your 60 ft is one of the most important times on your slip. If your 60 ft sucks- your time sucks...

 

[rstare]

wouldn't your motor run super hot because of the 10:5 pistons? that's if you bolt up a turbo....

Yes, in order to be turbo with 10.5:1 Compression Ratio, you need to have MegaSquirt to tune it, otherwise you'll detonate like a mother####er.

 

[habitatguy187]

You need to learn how to launch the car. You do not want to spin. Your 60 ft is one of the most important times on your slip. If your 60 ft sucks- your time sucks...

What was your front tire pressure at? What as your trap speed?

 

[Diamondrev]

What was your front tire pressure at? What as your trap speed?

i have really crappy street tires. i went to jiffy lube last week for an oil change and the guy put my tires at 44 lbs no one running at the track had a tire pressure gauge.

my 60 ft was 2.6 and my trap speed was 82 mph..

 

[bullettdsm]

i have really crappy street tires. i went to jiffy lube last week for an oil change and the guy put my tires at 44 lbs no one running at the track had a tire pressure gauge.

my 60 ft was 2.6 and my trap speed was 82 mph..

Yeah, lots of problems there. Here's a little thought on mods; I went 14.8 in my dailly (at the time) by running 10.5 pistons, UDP, 60mm TB, and MSnS.

To prove a point about the 60mm TB, I ran a bunch of times (it was a club drag day) and the best I could get was in the 15.2's. I put the 60mm on and immediately ran a 14.8.

MSnS and breathe.

MB

Plus you can see the driver situation there with your times

 

[barza21]

i have really crappy street tires. i went to jiffy lube last week for an oil change and the guy put my tires at 44 lbs no one running at the track had a tire pressure gauge.

my 60 ft was 2.6 and my trap speed was 82 mph..

i thought i would get a pretty good time but i guess the launch is everything, on the street i never launch, when my buddy and i mess around we always do it from a roll. he has a 13 second 1st gen awd and i can keep up with him.

Lower the tire pressure to 25psi or something. Get a tire pressure gauge.

those 0-60' are horrible. Your launch is what is killing you. I have a 8.8:1 compression engine with some crane 16's and am running 17.00 flat on the 1/4 mile and I am close to 5200ft above sea level. I believe I can touch 16s if I redline the car. I trap at around 81mph and my 0-60' are 2.4xx or 2.5xx most of the time.

Check your launch, lower the tire pressure. With your trap speed you should be seeing 16's all day.

 

[Diamondrev]

Yeah, lots of problems there. Here's a little thought on mods; I went 14.8 in my dailly (at the time) by running 10.5 pistons, UDP, 60mm TB, and MSnS.

To prove a point about the 60mm TB, I ran a bunch of times (it was a club drag day) and the best I could get was in the 15.2's. I put the 60mm on and immediately ran a 14.8.

MSnS and breathe.

MB

Plus you can see the driver situation there with your times

Bullet i look up to you alot. i have every bolt on that you have on your daily driver except MSnS.. still i thought i would atleast be in the 15's.. well im going for the afx ecu and some new tires.. see where that gets me.

 

[cs82685]

Bullet i look up to you alot. i have every bolt on that you have on your daily driver except MSnS.. still i thought i would atleast be in the 15's.. well im going for the afx ecu and some new tires.. see where that gets me.

Why waste the money (and the time) getting an afx ecu from howell, you could learn all you need to about MSnS and learn how to use it/tune it for about the same price, not to mention you'll want it when (if) you boost the car. Oh and some good tires should definitely help.

BTW, have you done any weight reduction, I know Mark has done quite a bit

 

[Defiant]

i have really crappy street tires.

i went to jiffy lube last week for an oil change

and the guy put my tires at 44 lbs

no one running at the track had a tire pressure gauge.

I can't even figure which of those is the greater crime. Going to a track without tires, letting Jiffy Lube try to strip the drain plug, putting 44 pounds in passenger tires, or not having a tire gauge in the car.

 

[joescool2008]

I can't even figure which of those is the greater crime. Going to a track without tires, letting Jiffy Lube try to strip the drain plug, putting 44 pounds in passenger tires, or not having a tire gauge in the car.

Air pressure gauges for tires don't add horsepower, if you really need to know get out and kick the tire and if your foot doesn't bounce, THAT TAR IS FAYLAT. In the world of racing gas mileage doesn't matter, as long as your rim isn't hitting the ground you are fine sir.

 

[Diamondrev]

I can't even figure which of those is the greater crime. Going to a track without tires, letting Jiffy Lube try to strip the drain plug, putting 44 pounds in passenger tires, or not having a tire gauge in the car.

Ok thanks defiant, lesson learned.

Megasquirt EMS Kit - 420A - SymTech Laboratories
i will be ordering this soon. i know its not a plug and play but im ready for the challenge.

 

[bullettdsm]

and my trap speed was 82 mph..

This is just bugging me. I know you just recently rebuilt, but try a comp check. There is something else going on with a 82mph trap. Maybe comp, maybe plugs, maybe heat, that trap seems low for what you got.

MB

Oh yeah, I got no problem with the AFX/ECU. I think I mentioned to you before that its curve and max hp came real close to what I came up with on the MSnS, so its pretty nice for a bolt on. Unfortunately, its not as adjustable like the MSnS. It just adjusts itself. Keep us posted if you try to get it.

 

[Defiant]

Air pressure gauges for tires don't add horsepower

No, but three psi can make a half-second's worth of difference in how a given tire will either hook up, or go around a corner. And back on the street, it can make a mile-per-gallon's difference in how far you can drive. Digital gauges are all over the market -usually even including the super market- for five bucks. Far too much value to not have in the console.