Attempting to run 18psi !!!!

[Revere sho]

ya as the title says im going to try and run 18psi. the story behind the change is that i ran into a problem with my current setup, i blew a few piston rings. well now instead of doing just piston rings i got a great deal on another supercharged sho with alot of nice goodies on it. well i plan on putting the 3.2 low compression motor into my car with an t-trim vortech. the car has alot with it but just in pieces. what kinda things should i look out for or get to make this car run to its maximum potential. so far to name somethings off of the top of my head is that it has a quaifed tranny, wide band o2s, big bores, ported intake runners, low compression pistons, 3.2 converted, stage 1 street cams, tweecer rt, and a vortech s-trim charger that i sold to get a t-trim. what else do i need to look for?

thanx for the help, corey.

 

[SHOOFF13]

Nice Corey I can't wait to see this beast once it's completed. What is the difference between standard 02's and wide band 02's? Well keep me informed on the project. I haven't driven my car since last time I saw you because I have been sick all week. Oh well the car needed a nice rest after all the driving its been getting, lol.

 

[SinisterSHO]

Most of this has been covered, many times. You only need one wideband, and you will still need to run your stock sensors.

 

[SHOMurph]

You'll need to do something with your blow off valve (either change the spring or get a new one.) Even if you put a smaller pulley on....it will still blow off at 15psi (it'll just blow all the time!)

 

[Ishodu]

HD gear set would be nice as well Sounds like it will be a nice ride.

 

[Super Matty P]

SHOmurph...on a similar note. to reply to your post. I actually built my SC system where the bypass valve purposely vents to atmosphere under normal driving but only under load will it snap shut and feed the charge air through the MAF. I found this was much easier to tune for but my car isn't a SHO or OBD1 for that matter.

 

[Revere sho]

the whole system is brand new. is there a set spring i need to use or i can just use the spring that came with the blow off valve.

 

[SHOMurph]

the whole system is brand new. is there a set spring i need to use or i can just use the spring that came with the blow off valve.

I dont' know if you can change the springs. Never dissected mine.

Here are the spring ranges:

http://www.horsepowerfreaks.com/sale/HKS/Blow_Off_Valves/Blow_Off_Valves/part/Racing

 

[Revere sho]

Cool Those Work Good. Just Wondering What Is The Most Psi That Anyone Has Run Though These Sho Motors? How Much Can They Handle Manly Cause I Ve Seen That U Can Get Other Vortechs That Run High Psi. I Just Havent Heard Of Anyone Try It Yet. Just Wondering Howcome?

 

[SHOMurph]

Cool Those Work Good. Just Wondering What Is The Most Psi That Anyone Has Run Though These Sho Motors? How Much Can They Handle Manly Cause I Ve Seen That U Can Get Other Vortechs That Run High Psi. I Just Havent Heard Of Anyone Try It Yet. Just Wondering Howcome?

I think its mainly two issues: before Josh and Adam tuning was the biggest reason. No one was tuning these things properly.

Second: Tranny and axles breakage.

 

[shodup]

Second: Tranny and axles breakage.[/QUOTE]



So a reinforced tranny and stronger axel might be needed, trial and error will tell.

 

[Lupo]

You'll need to do something with your blow off valve (either change the spring or get a new one.) Even if you put a smaller pulley on....it will still blow off at 15psi (it'll just blow all the time!)

The standard BO/bypass valve has 2 ******* on it. You hook up one that bypasses whenever there is vacuum. The other ****** bypasses when it reaches a certain psi for safety, which is dictated by your spring. Simply don't hook up the second ******, and it will never bypass due to boost.

 

[40BelowSummer]

Second: Tranny and axles breakage.

So a reinforced tranny and stronger axel might be needed, trial and error will tell.

$7000+ through SHONut, right?

 

[RJ-92]

$7000+ through SHONut, right?

Sounds about right. That's why my boosted SHO will be in a RWD aplication. For $7K I could build the whole car!

 

[SuperchargedSHOguy]

I have run 18+ psi here with no BOV issues

 

[TYSHO]

Here are the spring ranges:

http://www.horsepowerfreaks.com/sale/HKS/Blow_Off_Valves/Blow_Off_Valves/part/Racing

Screw those, go get you a big HD Vortech Mondo BOV!

 

[Wht91+]

I think you should listen to SHOMurph. He knows what hes talking about ....or dont listen and blow it up or have it not perform. personal opinion.

 

[TYSHO]

I think you should listen to SHOMurph. He knows what hes talking about ....or dont listen and blow it up or have it not perform. personal opinion.

Who?

Anyhow, you can go look up on the Mondo valve here if you don't think it's adequate. What you want in a BOV when pushing high boost, is one that can discharge more air flow. And the Mondo BOV is one of the best out there, although you would need to install a new ****** to adapt the BOV on SHOShop piping.

 

[yamahaSHO]

With the SHO Shop setup, the bypass valve does not do everying it should. I have the lightest spring (6 psi) in my valve and it will not open up at 11 PSI. The placement of the valve is not ideal, so using this as a pop off/safety valve is probably not a good idea.

 

[shodup]

I have run 18+ psi here with no BOV issues

Thats because your out of your Damn mind