5.5psi on 91pump yes or no.

[trd4life]

he is running the 3.2" pulley , not the 3.4"

[ToyoSolV6]

fergie your tuned to bbq bob's settings, its not the same, you also need to dyno your car, if you blow your car up, i want the sc back, lol, but im serious about the tuning...............

lol yeah i know about the tunning Frank i haven't forgotten about that.

[sarki]

he is running the 3.2" pulley , not the 3.4"

Soon to run the Dawgz special pulley.

well i talked to you on the phone loco.

just do what i did. you should be alright.

Word up homie im going to do just what we talked about real soon. :wink

[Dawgz]

lol

u will like the 5.5

[TRDSleeper]

After reading everyone's responses I noticed that nobody mentioned anything about spark plugs. Do they play a role in reducing engine knock? I am using Denso Iridium IK22 spark plugs which are 1 step colder in heat range than OEM and I haven't encountered any problems so far. I recently installed the 5.5 psi pulley last week. Here's my set up if anyone would like to know:

5.5 psi pulley
Denso iridium IK22 spark plugs
Walbro 255 lph fuel pump
Jim's fuel mod
Stock fuel injectors
Apexi SAFC II (installed but not tuned yet)
Chevron 91 Octane gas
OBX headers & y-pipe

So far I haven't mash the gas pedal flat to the floor so I don't really know if detonation will occur at the high RPM but I have brought it up to 5000 rpm with no issue.

[Dawgz]

i use the NGK Iridium plugs.

[jetbtkng]

your living dangerously, again these are the standards that should be followed,
here it is in a nutshell, with 5.5 psi pully, and our 10.5-1 compression, will result in about 14-1 compression with 5.5 pully, Final compression ratios above 12.4 to 1 are not recommended for use with "premium pump gasoline." The higher the final compression ratio the higher the octane rating of the gasoline must be in order to help prevent detonation and serious engine damage. i also run a cooler plug, but thats not the awnser, octane, & timing are the solution............

[TRDSleeper]

Shoot, sounds like I really need to get a tune then.

[trd4life]

no you need met hinjection or 94.2 octane, AND a tune

[sarki]

TRDSleeper, Ive come to the conclusion that Methanol injection IS a very necessary accessory to invest in for the 5.5psi pulley. Lots of people say it will run fine on the 5.5psi pulley but they cant say for how long untill the rings go byby. If i where you i would take it easy for a while and get a tune AFTER YOU GET BIGGER INJECTORS. I myself am going to wait until i can either get a Split Second to retard my timing or just get a Methanol injection kit before i install my 5.5psi pulley. Ive been talking to a lot of people outside of this forum. People that have been in the car game way longer than me and they all agree that the final compression is too high to be safe. Thanks for all the reply's my SG'ers.

[20SoLaRa02]

My current setup is this: 5.5 psi pulley, jpp headers/y-pipe, apexi exhaust, k&n drop in, supra injectors that everyone runs, jims fuel mod, 190 walbro fuel pump, denso ik22's, magnacore wires, innovate lm-2 wideband (working on street tune).

With that being said it sounds like from this thread that i should be running high octane than the 91 pump gas i am currently using. After reading these comments i am now debating what to do. In the mean while am i doing serious damage for now if i drive it very easily and mostly highway on pump gas?


Thanks in advance,
Michael

[sarki]

My current setup is this: 5.5 psi pulley, jpp headers/y-pipe, apexi exhaust, k&n drop in, supra injectors that everyone runs, jims fuel mod, 190 walbro fuel pump, denso ik22's, magnacore wires, innovate lm-2 wideband (working on street tune).

With that being said it sounds like from this thread that i should be running high octane than the 91 pump gas i am currently using. After reading these comments i am now debating what to do. In the mean while am i doing serious damage for now if i drive it very easily and mostly highway on pump gas?


Thanks in advance,
Michael

If you drive the piss out of your car, Your going to mess it up eventually. The final compression is too high. I finally got that through my thick skull and im not going to risk it. Run a Meth kit or get a Piggy Back and have the dyno shop retard your timing for longevity. I think im going to go with the meth kit myself but thats going to be way later in the future.


Let me take this opportunity to thank all the guys that commented and gave me there 2 cents. Its greatly appreciated and it helpes other members get educated on the subject.

[Slut]

Just from my own opinion.. Like most are saying without a meth kit id be very iffy about doin the 5.5... even with 93 octane.. Do you guys really have any idea how many ringlands on how many motors ive destroyed with 5.5.... Forget the pics of what I did to the rods at 12 pounds But yea.. Rich, lean, it wont flippin matter if you beat on it runnin it to redline through the gears.. you will start spiking and will eventually crack your lands. I GUARENTEE IT. I love the car.. Im a master ASE cert'd so when I tell you ive swapped in 4 motors within a year.. Believe it 5.5 is fun... not worth breakin crap though.... Build it up and do atleast 8 pounds... Then well talk about fun. When I finish up my nissans sr20.. Im gonna probably slap a rear mounted turbo on the solara.. Make her twin charged.. Anyways good luck and god bless those ringlands

[EricSol]

Interesting discussion, everybody has an opinion. But has anybody data logged timing at 5.5psi and 100 octane and then run 91 to see if the knock sensors are detecting detonation? If you were to get a timing controller how much timing to pull for 91 and 5.5 if any? Does 7psi and 10 degrees out make more power then 5.5 and all the timing in? Maybe instead of theorizing and guessing some old fashioned data logging might be useful.

[sarki]

^^ Thats a great question, This would tell us if we really need a Spit Second to play around with the timing and what psi pulley would be the best. The problem is, Will anyone take the time and do the research?