Say one were to upgrade to a larger Vortech SC (booger), run the smallest pulley for maximum available boost, plumb in a small wastegate on the outlet side of the SC and control it with a boost controller. Would this work?? The excess boost would be discharged into the SC intake tube just like a BOV or maybe into the exhaust..

 

Its already been done . A wastegate was installed on the pipe running down to the BOV [ bypass valve ] A electronic boost controler was used to bleed off the boost . From the data logs I seen of it , it seemed to work really good . He was still on the stock blower , but was using the 2.87 pulley on a stock block . He bled boost off at 8 or 9psi . It would have to be done with 6MT as there isnt enough room in front of the motor on a AT5 . He had a G35 Sedan , so Im not sure if you could even fit it in front of the motor on a MT6.
Some one else has done it , by moving the BOV to the other side of the IC , and placing the wastegate where the BOV was . A electronic boost controler needs to be used because a manual doesnt react fast enough

 

yea craig (gspot35) installed a wastegate on his 03 sedan with an a/t. then sold it to brian (forced6) who has a 04 coupe 6spd. cant remember the exact set up but i do know hes using the 11lb pulley, upgraded bov thats still in the factory location, and a wastegate in between the bov and maf with no boost controller. i wish i had more details but hopefully one of them will chime in.

 

Cool...Did not know it had been done before.. Seems very logical as it's just a controlled boost leak..

EDIT: New post popped up while typing...
Would it matter WHERE the WG was mounted ie. fore or aft of the BOV??

 

would it make more sense to integrate the wg after the bov for more boost control? but im not sure exactly, plus there isnt much room ne where else on the piping between the blower and the maf.

 

would it make more sense to integrate the wg after the bov for more boost control? but im not sure exactly, plus there isnt much room ne where else on the piping between the blower and the maf.

 

If you do it before the BOV [ as it sits now ] you dont have to send the over boost thru the IC , and intake air temps would stay cooler. Like I said earlier . I think the best way would be to move the BOV to the other side of the IC and put the WG where the BOV is now

 

why? What is the point?

 

Was it not clear??

 

When you can choose between pulleys you can the boost level so why worry about boost controller? I have a procharger myself and I see no reason as to why a boost controller would ever be needed. Do you want to limit your maximum HP at higher rpms? It just does not make any sense to me.

 

WHen some one wants to keep the boost at 8 or 9psi , but wants it sooner . You can install the smallest pulley and have the boost sooner in the rpm range , but still limit the boost to your set point . Basicly the same idea as a turbo

 

Thanks Booger, I see your point. But it just sounds like allot of time and money for just getting a few psi a little earlier.

 

people spend alot of money for small gains, its part of the gain and it doesnt seem to cost over 1000 bucks including evertyhing so it is a fair price for the increase in response just my opinion

 

+1

 

Great idea.I have an greddy boost control just sitting in my garage so all i will need is a smaller pulley(287)and a wastgate! Booger send me some pics might try this when i add my utech.

 

Booger, tell me more about doing this. I want to run a smaller pulley to have more boost lower in the RPM range. Tell me about sosts to do this as well as what to buy. Is an EBC necessary or would a MBC work? I guess costs are an important question as well.

If anyone who has done this could help me out, that would be great!

 

Ive never did it . But it shouldnt be to hard to figure out . An external WG , elec boost controler , modify the IC pipe coming out of the blower to except the WG

 

Wasn't trying to be a d!ck bro... Sorry for the "snapish" reply..

Booger pretty much explained why..It's just the idea of having easier control of boost in an SC application without the hassle of switching pulley's all the time.

 

Dammit man! I thought you had.

 

I was the one who did it. I'll post up some pictures of my setup. I had a custom "down" pipe made from the blower outlet to the BOV inlet pipe. This allowed me to bleed off boost with out tying up the IC. When I sold the setup the new owner had no room to mount the WG before the IC, so they mounted it in the 180 pipe just after the IC. I should also mention that I removed the factory fans and replaced the fans with a flex-a-lite thin fan setup. This gave me room for the WG. I tried to use a manual boost controller but it reacted too slow and cost my engine management to flake out. I removed the MBC and relied solely on the 8psi spring in the WG. This was the best way. I used an air compressor and simulated boost to diagnose all of this. The good news is using a 2.87 pulley w/WG allowed me to make 5-6psi at only 4500 rpms instead of at 5500 rpms. That means you're making more boost in the torque peak. My dyno was somewhat unique matching peak hp and tq numbers, instead of the usual 370ish hp and 300 tq. Mine was more like 350/350. Not to mention more streetable power. Best 1/4 time was 12.8 in a G sedan at5.