The LS4 gains more than just 4 ponies... this topic has been beaten to death

movingswiftlythef#%konnow

Nice gain OP

 

lol it has, i was actually gonna hit you up to see what you netted from it, i couldnt remember

 

10whp without changing a single airflow/fueling/timing table. Only thing changed was the scaler.

The gain was through out the entire power band

 

you only tested it though, right? you dont use it any more?

 

non sense... why would I downgrade? I run it with my 2.5 pulley on the ported m62.

 

I'm scared of the 2.5. Plus Id still like to hit 7k rpm. I bet the torque is good though

 

hmm, maybe im thinking of jr's car then one of you recently were swapping tb's but i think just for testing/gains


wonder how hard it'd be to get the stock cai to work with the ls4

 

it's still slow

the m62 is pathetic

but yes... torquey for a m62.. spins 2nd at will.. on a cool night

we tossed the ls4 on his car with the tvs on it, but didnt dyno it. Didn't have time

 

you should for sure break 300 whp with tvs

 

im thinking of swapping to the ls4, but realy how bad is the trottle responce?

 

Apparently its all in the tune, but I'm no tuner so I have no specifics

 

Its more alive compared to stock. I have zero gripes driving w/ this throttle body. I personally cannot stand driving on the stock one. The car feels lazy and unresponsive when on the stock throttle body.

scaler: 4950
setup a custom histo to add [sens.114]+[sens.116]/2 (Use the MAF vs output freq. table)
- This will add your LTFT AND STFT and divide by 2.
- Simply multiply the hit cells by % 1/2 into your MAF

Whalaa...

 

now, why do you have it divided by 2?

 

To get an average. Add both numbers and divide by 2 to get an average of the combined sum.

 

i see...i have only tried to use my ltft + stft histo once. it was set up by 04Redline(shaun) and no /2 i'll have to change that

 

Huh? Why average the (LTFT + STFT) ?

When LTFT = -10 and STFT still subtracts -5 at one point to get a 14.7AFR, theoretically that point should be corrected then by -15.

But ulimately it doesn't make that much difference for tuning; averaging just lowers your correction numbers by 1/2. Like multiplying by %1/2 does...

 

i use this a lot unless something is WAY off

 

The point is so you can make finer adjustments. It's very easy to over shoot cells 1.6-2.4...

 

I was running the LS4 tb and took it off. I thought it was a pita. I drove it for a summer so I had plenty of time on it. Gains are only going to be made with a small pulley or a TVS. The throttle response feels awesome, I will say that. But response doesn't mean your making more power, your just getting thrown into boost very quickly. The car runs way better on the LSJ tb imho.

This.

 

Ok so i was able to look at ure tune. This is what i seen, he is not scaled for the ls4 throttle body meaning he was still in the stock scale, timing needs work, they did tune in the maf calibration.. so i did change the tune up a little with john. So get with john soon so you can properly be tuned

 

To be honest on the LSJ I usually just get a longer log and use the LTFT to get things in check unless its way off to begin with. I just like making smaller adjustments rather than possibly having to work backwards. Just my weird way lol

 

is the ls4 tb setup any different as far as "streetablilty"?

 

This topic is getting interested...if we can get 10whp out of this, it would be a awesome mod! With a tvs

 

is the LS4 TB worth it for us LSJ turbo guys looking to push more the 450whp?

 

Bigger isn't always better...

https://www.cobaltss.net/forums/2-0l...esting-171566/

Did anyone see what I wrote a few days ago? I do not have an LSJ so I cannot monitor the map sensor on the SC, but if I did that would be the indicator of whether or not I would upgrade to another size...or simply port your existing LSJ TB. Does anybody have dynos of TB swaps before/after with their other mods listed?