Low dyno run...need advice

[alkemyst]

http://driftkat.com/images/Dyno20080712.jpg

Mustang Dyno peaks at 119RWHP and 126RWTQ.

Should be closer to 155RWHP/155RWTQ based on others with similar mods.

I have done:
248 exhaust cam to the intake with +2.5 degs advance

New wires, NGK's, O2's, rotor/cap.

Header, 3" cat, 5Zigen Pro Racer Aspec 80mm exhaust

Injen Intake

A/F ratios were good...only thing I can think of is the cam is bogus.

I was at 108RWHP at first and we advanced the distributor 3 degs

Thanks for any help.

Å

[Psycho 240 Freak]

How many miles on your KA? Mustang Dyno's always have a way of being a little bit disappointing, but I think they're pretty accurate. My hp reading and my trap speed coincided together.

[alkemyst]

How many miles on your KA? Mustang Dyno's always have a way of being a little bit disappointing, but I think they're pretty accurate. My hp reading and my trap speed coincided together.

98k but the compression is 175 across the board.

I am not sure if these were mustang readouts too: http://forums.freshalloy.com/showthread.php?p=1535048

[tougekid]

we have a mustang dyno at our shop, and yes, there are a lot of broken egos.
the numbers dont look to far off from what i remember about my ka.

[alkemyst]

we have a mustang dyno at our shop, and yes, there are a lot of broken egos.
the numbers dont look to far off from what i remember about my ka.

What does a stock KA lay down? I thought it was in the 125WHP range with no mods. I am worried someone sold me a cam that wasn't a 248.

[Psycho 240 Freak]

I remember Sport Compact Magazine years back dyno'd a stock S14 KA at about 125 whp. So you're not too far off. Dyno's just a tool for tuning. If you want to see how much power your car's laying down, run down the 1/4 mile. I think your time and trap speed are better indicators of power than a dyno.

[alkemyst]

I remember Sport Compact Magazine years back dyno'd a stock S14 KA at about 125 whp. So you're not too far off. Dyno's just a tool for tuning. If you want to see how much power your car's laying down, run down the 1/4 mile. I think your time and trap speed are better indicators of power than a dyno.

I am way off then...1/4 mile is a better indicator of the driver than the car.

I need to check the cams again...my idle is great so I don't think I can be a tooth off. I am just wondering if I someone got a 232 exhaust cam and now running that +2.5 advanced. I would think it would be no different at that point than the factory 232 intake, but I am not positive on how the 232 exhaust lines up as an intake cam with the 4 teeth CCW method.

[98s14inaz]

Check your knock sensor and timing. If your knocking you ecu will pull timing and you will lose power. I would not expect to get anywhere near 155whp with those mods. The only way I have seen them come close is with ecu tuning and huge cams....or individual throttle bodies. I'm willing to bet timing in your case though.

[g6civcx]

A/F ratios were good...

What would you consider to be good?

[alkemyst]

What would you consider to be good?

It's on the dyno sheet...13.5 average.

[alkemyst]

Check your knock sensor and timing. If your knocking you ecu will pull timing and you will lose power. I would not expect to get anywhere near 155whp with those mods. The only way I have seen them come close is with ecu tuning and huge cams....or individual throttle bodies. I'm willing to bet timing in your case though.

Timing was right (unless I screwed up the cam timing...but I am not sure how I could have done that and still have it idle right).

At the stock timing (verified by timing light and ecu reading 20BDTC) I made 108HP, advancing the distributor ~2-3 degrees picked it up to 119hp.

I am going to try to go out in a minute with my GTech and see if at least my 0-60 improved. Don't know if I can pull off a quarter mile anywhere.

I am curious on the knock sensor. I read how to test it, but I don't know how I can get probes to it.

[g6civcx]

It's on the dyno sheet...13.5 average.

Why do you consider anything above 13:1 to be good?

[alkemyst]

Why do you consider anything above 13:1 to be good?

The range my afr is in is fine. The average is skewed by the max reading. This is the stock ecu and I am not running anything to adjust fuel.

The other dynos I have seen also did not have fuel controls. If something is off here, where do I look?

[98s14inaz]

Timing was right (unless I screwed up the cam timing...but I am not sure how I could have done that and still have it idle right).

At the stock timing (verified by timing light and ecu reading 20BDTC) I made 108HP, advancing the distributor ~2-3 degrees picked it up to 119hp.

I am going to try to go out in a minute with my GTech and see if at least my 0-60 improved. Don't know if I can pull off a quarter mile anywhere.

I am curious on the knock sensor. I read how to test it, but I don't know how I can get probes to it.

What i meant is if the knock sensor is bad your car goes into limp mode to protect your engine. The knock sensor has a harness that goes to the front of the engine...look for a small gray plug bolted to the upper front cover. You might be able to check it there. I'd just replace the bastard and be done with it.

[norbac]

it would be awesome if they can dyno just a bone stock 240, then it'd be a better comparo

[alkemyst]

What i meant is if the knock sensor is bad your car goes into limp mode to protect your engine. The knock sensor has a harness that goes to the front of the engine...look for a small gray plug bolted to the upper front cover. You might be able to check it there. I'd just replace the bastard and be done with it.

I'd rather not keep throwing $100-200 a pop at guessing though.

My car has not gone into limp mode...but I thought the KS doesn't actually put it there, just reduced the timing until it's clear.

[SR2Zero]

I remember Sport Compact Magazine years back dyno'd a stock S14 KA at about 125 whp. So you're not too far off. Dyno's just a tool for tuning. If you want to see how much power your car's laying down, run down the 1/4 mile. I think your time and trap speed are better indicators of power than a dyno.

How so? With running down a drag strip you have to figure in more things than "how much power you're laying down" Hooking up, tires, launching.. ect.

[burnsauto]

take it to a dynojet and quit whining.

mustang dyno's are the most harsh ive seen, but the most accurate. The 248 cam on the intake is a very small upgrade...its not even really an upgrade...just more of a "trick". The results have always been very minimal using them.

Numbers like this are the reason why you don't see many fully built N/A ka's around...they don't like producing huge amounts of power.

[steve shadows]

Yeah when people strap their cars down to brake-eddy dynos (like dyno dynamics, mustang dyno) it's usually a rude awakening.

DD reads even lower than mustang and power-dyne haha

[alkemyst]

This is not about being disappointed with a run. It's about the run being lower than it should be. If the mustang dyno is reading 13% low that's fine, however me getting 108RWHP with I/H/E, 248 cam is like turning 124 on a dynojet. That's worse than stock.

I wasn't expecting 200+HP...but I wasn't expecting only 100 either.

I am looking for those that may have similar mods and have a mustang dyno run or someone that can give me some advice...

[Z U L8R]

we have a dual eddy mustang 1750 at our place and many supra dyno queens have left pissed off hahaha.

mustang dyno = what ferrari uses to tune their lemans cars on....

you can't run the 1/4 mile on a dyno dynamics either muwhahhaa

our mustang dyno can handle 2500hp and go 250mph...which is twice what a dyno dynamics can do. you can run the 1/4 mile on our dyno. burn out and everything.

the problem is...everyone wants to be lied to. they want dynojet numbers so they can say their supra makes 600hp...then strap it to a real dyno that tells you how much hp the road is actually feeling and they see 400 something and cry. it's cool tho. i'd rather run a 600hp mustang and smoke him with my car only making 300hp on a mustang dyno.

MUSTANG DYNO FTW!

Dave @ Lethal Injection Motorsports =]

[burnsauto]

pretty much.

If you looking for "advice" on what to do.. basically do more to the engine. I understand you're dissapointed in your hp numbers, but facts are facts...and you'll just have to face them.

If you don't like the hp you're seeing, save up, and start building. thats about as much advice as i can give..

[Dream240]

This is not about being disappointed with a run. It's about the run being lower than it should be. If the mustang dyno is reading 13% low that's fine, however me getting 108RWHP with I/H/E, 248 cam is like turning 124 on a dynojet. That's worse than stock.

I wasn't expecting 200+HP...but I wasn't expecting only 100 either.

I am looking for those that may have similar mods and have a mustang dyno run or someone that can give me some advice...

I'm thinking I would check your fuel pressure (faulty FPR, plugged filter) and MAF condition (clean it). Also check your fuel injectors for a faulty one. You might be having starving/clogging issues.

The huge drop in torque from 2500 to 3500 rpms is troublesome. I've never seen a 240 have a drop that bad before on a dyno....any dyno.

edit: nevermmind, i re-read your post....A/F was good. Why don't you try swapping back in the stock cam? See what happens.

[idahotuner]

where would a dynocoom fit in there with mustange dynos and dyno dynamics

[jskateborders]

Why do you consider anything above 13:1 to be good?
hes not boosted, so thats not too bad

[g6civcx]

hes not boosted, so thats not too bad

I hear you, but AF is a little too lean according to what I think it should be for an all motor car at WOT.

Thoughts?

[alkemyst]

I hear you, but AF is a little too lean according to what I think it should be for an all motor car at WOT.

Thoughts?

under load though...it's fine.