redtop sr20 help! please read! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

stevejames3 · 03-31-2008, 07:36 PM

ok im having a problem with my redtop sr20, its in a s13. it runs good at idle and free rev, so i took it out for the first time in a while. it was at the shop, they were testing some **** thats wrong with it. its never really ran right, so i got an enthalpy ecu and now this is where im at.

i let it warm up. then i took it out to see how it handles boost under a load. the first few minutes it ran pretty good. put some fresh 94 octane in it. then i got on it pretty hard, to test it. the higher rpm range it brakes up and basically keeps breaking up. kinda think of like a fully automatic gun. it seems like if i slowly get into the boost it takes it better, and slowly raise the rpms.

the only things that i can really think of is that the gas that was in there was kinda ****ty(still sunoco 94, just a little old as i was gone on military leave for about 8 months), the coilpacks dont have the screws in them(into the valve cover), or a ground issue(which i think should make it run kinda rough at idle)

any suggestions or opinions would be greatly appreciated. sorry for the structure of this all, it kinda turned into a bit of a rant
mods:

hks 2510 turbo
z32maf
z32 ignitor
550inj
greddy dp, 3" all the way back
fmic.
enthalpy ecu, supposed to be tunes for 16-18 lbs. as close to 300 hp as i can get on a relativley safe tune.

blownmotor · 03-31-2008, 09:02 PM

bolt down your coil packs first ,possibly a bad maf

aNskY · 03-31-2008, 09:27 PM

my old car did the same thing when i had a bad (corroded) chassis ground.

stevejames3 · 04-02-2008, 02:00 PM

thanks guys im gonna try those out.

anyone else have any ideas?

stevejames3 · 04-04-2008, 04:35 PM

talked to enthalpy today and he said he tuned it for 91 for some reason. i run 94. would that make a huge difference?

*fliprayzin240sx* · 04-04-2008, 05:24 PM

nopes, that just means you have a bit of leeway from detonating. What spark plugs are you running and what are they gapped at?

Try running some BCPR7ES-11 and gap them down to .030, if its still breaking up, gap it down to .025.

KiLLeR2001 · 04-04-2008, 05:33 PM

Hows your timing? 15 degrees BTDC?

stevejames3 · 04-04-2008, 06:23 PM

Quote:

Originally Posted by fliprayzin240sx

nopes, that just means you have a bit of leeway from detonating. What spark plugs are you running and what are they gapped at?

Try running some BCPR7ES-11 and gap them down to .030, if its still breaking up, gap it down to .025.

yeah thats what i thought. right now im running ngk the bkr7 or whatever. who makes the bcpr7es? im not sure their gap. im getting the car back hopefully on monday. i had it at the shop so they could run some "tests". im gonna do the gap, ground kit, and bolt those coilpacks down, and check the fuel pump and shit. see what happens. it ran good at first but after i got on it a few times it started breaking up. or if i just "mash it". it seems to take the boost better if i slowly raise the rpms.

03-31-2008, 07:36 PM	#1
stevejames3 Zilvia Member Join Date: Jul 2005 Location: ohio Age: 38 Posts: 170 Trader Rating: (0) Feedback Score: 0 reviews	redtop sr20 help! please read! ok im having a problem with my redtop sr20, its in a s13. it runs good at idle and free rev, so i took it out for the first time in a while. it was at the shop, they were testing some ** thats wrong with it. its never really ran right, so i got an enthalpy ecu and now this is where im at. i let it warm up. then i took it out to see how it handles boost under a load. the first few minutes it ran pretty good. put some fresh 94 octane in it. then i got on it pretty hard, to test it. the higher rpm range it brakes up and basically keeps breaking up. kinda think of like a fully automatic gun. it seems like if i slowly get into the boost it takes it better, and slowly raise the rpms. the only things that i can really think of is that the gas that was in there was kinda **ty(still sunoco 94, just a little old as i was gone on military leave for about 8 months), the coilpacks dont have the screws in them(into the valve cover), or a ground issue(which i think should make it run kinda rough at idle) any suggestions or opinions would be greatly appreciated. sorry for the structure of this all, it kinda turned into a bit of a rant mods: hks 2510 turbo z32maf z32 ignitor 550inj greddy dp, 3" all the way back fmic. enthalpy ecu, supposed to be tunes for 16-18 lbs. as close to 300 hp as i can get on a relativley safe tune.

04-04-2008, 05:24 PM	#6
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	nopes, that just means you have a bit of leeway from detonating. What spark plugs are you running and what are they gapped at? Try running some BCPR7ES-11 and gap them down to .030, if its still breaking up, gap it down to .025. __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

04-04-2008, 05:33 PM	#7
KiLLeR2001 Post Whore! Join Date: Jun 2007 Location: オーランドフロリダ Posts: 7,955 Trader Rating: (46) Feedback Score: 46 reviews	Hows your timing? 15 degrees BTDC? __________________

03-31-2008, 09:02 PM	#2
blownmotor Zilvia Junkie Join Date: May 2006 Location: land of the sideshows Posts: 402 Trader Rating: (0) Feedback Score: 0 reviews	bolt down your coil packs first ,possibly a bad maf

03-31-2008, 09:27 PM	#3
aNskY Nissanaholic! Join Date: Apr 2005 Location: NY Age: 40 Posts: 1,604 Trader Rating: (10) Feedback Score: 10 reviews	my old car did the same thing when i had a bad (corroded) chassis ground.

04-02-2008, 02:00 PM	#4
stevejames3 Zilvia Member Join Date: Jul 2005 Location: ohio Age: 38 Posts: 170 Trader Rating: (0) Feedback Score: 0 reviews	thanks guys im gonna try those out. anyone else have any ideas?

04-04-2008, 04:35 PM	#5
stevejames3 Zilvia Member Join Date: Jul 2005 Location: ohio Age: 38 Posts: 170 Trader Rating: (0) Feedback Score: 0 reviews	talked to enthalpy today and he said he tuned it for 91 for some reason. i run 94. would that make a huge difference?