i kno wim probably gonna get chewed out for this but...

[twiztid240s13]

i jsut bought a s13 with a built KA in it and it has a stage 6 puck clutch in it with a welded diff<, my problem is that when i take off it jumps like it doesnt want to go, idk if its that i dnt ahve the rmps high enough or what, someone help me out and let me know how i can start off without it doing that, this is my 1st built 240, so dont be to harsh.

[twiztid240s13]

its just osrta umps back and forth idk whats causing it.

[twiztid240s13]

its 248 cams, it just just jerks back and forth when i take off i need to know what is causing this.

[Chaluska]

when taking off with a 6 puck, i usually rev it to about 13,000 rpms, then pop the clutch, that will get her going.

you did weld the diff here right?

[badbob2121]

Clutch chatter .. somewhat common with most 6 pucks

and next time use proper grammer when posting, its just easier to understand what they hell your asking. This isnt a text message..

[twiztid240s13]

when taking off with a 6 puck, i usually rev it to about 13,000 rpms, then pop the clutch, that will get her going.

you did weld the diff here right?

yes it is welded. I've pretty got it figured out now, i have to pull off at 2000 rpms or a little more to keep it from jerking and or rolling back wards

[95zenki man]

Thats crazy...i have never seen a car that needs to be anywhere near 2k rpms to roll without jerking...are you sure you know how to drive a 5 speed?

[twiztid240s13]

Thats crazy...i have never seen a car that needs to be anywhere near 2k rpms to roll without jerking...are you sure you know how to drive a 5 speed?

yes ive had multiple 5speeds, i called the guy i bought the car from and its the tune on the car it has a megasquirt standalone ECU, he has it tuned like that. i have no clue why, it needs a good dyno tuning

[alms24sebring]

Thats crazy...i have never seen a car that needs to be anywhere near 2k rpms to roll without jerking...are you sure you know how to drive a 5 speed?

[badbob2121]

it needs a good dyno tuning

Yes, I'm sure thats the problem..

[twiztid240s13]

it needs a good dyno tuning

Yes, I'm sure thats the problem..

i wasnt saying that would fix the problem, i was saying it in general, they guy tuned it off his laptop, and it was dynoed he just got it to where it could be driven, this is only my 2nd 240sx so sorry for not knowing alot about the cars, but no need to be a douche

[twiztid240s13]

it needs a good dyno tuning

Yes, I'm sure thats the problem..

i wasnt saying that would fix the problem, i was saying it in general, they guy tuned it off his laptop, and it was dynoed he just got it to where it could be driven, this is only my 2nd 240sx so sorry for not knowing alot about the cars, hinse the reason im asking the question

[Hoffman5982]

I've never understood why people throw such a strong clutch on low power motors. Fu**ing stupid

[twiztid240s13]

I've never understood why people throw such a strong clutch on low power motors. Fu**ing stupid

Its not a really low power motor considering its N/A and pushing between 220 and 250 hp on a KA. but yes the clutch seems to strong. i plan on turboing the car, got any suggestions or what i should do as far turbo kit or piece together my own turbo?

[bersh240]

Your N/A ka does not have 220hp.

Do you still have the factory clutch damper installed?
A high performance clutch + the damper box will make the car a devil to drive.
This is the most likely cause of a jerky start IMHO.

[zooopreme]

Your N/A ka does not have 220hp.

Let alone 155hp.

[kouki munster]

Its not a really low power motor considering its N/A and pushing between 220 and 250 hp on a KA. but yes the clutch seems to strong. i plan on turboing the car, got any suggestions or what i should do as far turbo kit or piece together my own turbo?

That is still low power, and with what sounds like a half assed tune you would be lucky to be making stock power on a n/a ka.

It sounds like you bought someone's half-assed, over ambitious, unfinished project that they got tired of dumping time and money in, and just did the bare minimum to make it drive able so that it could be sold to recoup some of the money that was pissed away.

[twiztid240s13]

Its not a really low power motor considering its N/A and pushing between 220 and 250 hp on a KA. but yes the clutch seems to strong. i plan on turboing the car, got any suggestions or what i should do as far turbo kit or piece together my own turbo?

That is still low power, and with what sounds like a half assed tune you would be lucky to be making stock power on a n/a ka.

It sounds like you bought someone's half-assed, over ambitious, unfinished project that they got tired of dumping time and money in, and just did the bare minimum to make it drive able so that it could be sold to recoup some of the money that was pissed away.

it has at least 200hp, the car isnt stock by any means it has alot done to it , but yes it does seem like it has a half a** tune. the guy showed me the receipts for all the things he had done to it. and one of my family members is a mechanic and has been for about 30 to 40 yrs, and he went through it and drove it and said it has atlesa 200hp if not more.

[kouki munster]

How many ~2800 pound 200 hp cars has your family member driven to compare it to? I'm not trying to say that it is impossible, I'm just suggesting that you don't get your hopes up.

The only way to know for sure is to strap it to a dyno and see what is puts out. Butt dynos are notoriously inaccurate and cannot be trusted for accurate power numbers.

[badbob2121]

over 200whp? BS...

What proof do you have? none..

your Uncle Jimbo's opinion of what 200whp "feels like" is not valid..

you should just stop..

[kouki munster]

Also, the jumping and jerking when you take off is probably a combination of the 6 puck clutch's nature to be jerky on take off and poor tuning causing the afr's to jump back and fourth between rich and lean and/or timing changes that are to abrupt in the rpm range where you are trying to take off.

[95zenki man]

Wait isnt the question that needs to be answered " who in the sam holy hell would put that clutch on a n/a ka let alone get a n/a ka tuned"


I mean im only on my 2nd two forty and i already know pretty much everything i need to for the basics...

By the way guys. Just did a sick f*** nasty burnout and i can guaranty im only making 140ish tops. Car is sooo fast! Should i get it tuned for more power??

[Hoffman5982]

Do you even realize how much money is involved in getting a n/a ka past 200hp?

[alms24sebring]

Agreed. Dyno it and see for sure. What kind of parts are we talking and it better be more than thicker spark plug wires and lightweight pulleys. I dont know what to say, Id like to see how you drive it personally. Rev it up alittle more. It might just be a bad combo of a weak motor with a super strong unslipable clutch

[twiztid240s13]

over 200whp? BS...

What proof do you have? none..

your Uncle Jimbo's opinion of what 200whp "feels like" is not valid..

you should just stop..

no im not saying 200+ to the rear wheels. but the guy had a s*** tone of monety in the motor of this car, and with him being a mechanic for 30 yrs, im pretty sure he knows what the hell hes talking about, considering he builds race cars among other things as well,

[twiztid240s13]

Agreed. Dyno it and see for sure. What kind of parts are we talking and it better be more than thicker spark plug wires and lightweight pulleys. I dont know what to say, Id like to see how you drive it personally. Rev it up alittle more. It might just be a bad combo of a weak motor with a super strong unslipable clutch

thanks for the input, there are to many arrogant people on here that try and make other people look stupid just because they dont know as much as them.

[Morph]

Not trying to make you look stupid but alot of us have been around these cars for years and years, so telling us that your KA has over 200Hp is a little ridiculous. Getting that motor to even 200 CRANK HP takes some time and A LOT of money.

Oh just becasue you've been doing something for over 30 years doenst mean you know wtf your talking about. Congress for example. I'd be more than willing to guess off of what you've told us so far the the guy was and is full of crap.

[twiztid240s13]

Not trying to make you look stupid but alot of us have been around these cars for years and years, so telling us that your KA has over 200Hp is a little ridiculous. Getting that motor to even 200 CRANK HP takes some time and A LOT of money.

Oh just becasue you've been doing something for over 30 years doenst mean you know wtf your talking about. Congress for example. I'd be more than willing to guess off of what you've told us so far the the guy was and is full of crap.

well considering it out runs civics with h22a motors all day long which stock produce 197hp, (zerolift autolab h22a engines) thats proof enough for me ive drove the car and have drove cars producing around 700 hp

[badbob2121]

[kouki munster]

With the warm weather here, there is bound to be a performance shop in your area that will be hosting a dyno day soon, so just go strap it to a dyno and see what it puts out and shut up everyone that doesn't believe you. Make sure that you take a video camera so that you can get proof.