Back pressure test results, when is it too much?
You theoretically could monitor pressure anywhere, but would not be a correct reading if you have an external gate, especially twin gates.
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How does the car spool? fast/ok/slow?
Anyone else running a similar setup with another brand turbo? What kind of hp they making?
Crank the boost and see what she does and check the bp.
Im curious to know if Unleashed measured their bp. Maybe they can lend some insight.
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I'm not running the ct5,i tried and it wouldn't fit. Im running their ct43 80/79. If I ditched the ac condensor I could fit the 5.
My car spools very fast, faster if not the same as my old setup,347 and tc78.
My car spools very fast, faster if not the same as my old setup,347 and tc78.
I'm very happy you posted your results. It saved me some work down the road doing an upgrade to a T6. I thought the x trim might be just enough for what I want.
Once you swap to the CT5 w/bb the price goes way up...that's why I went to a fresh used GT47r vs trading/upgrading my 8079.
Sounds like a bad *** street occasional strip setup due to the small turbine and t4. It looks like it will work better than a T76 s trim.
You should be able to get it into the mid 9's if desired an it's not too heavy.
What's the vehicle and what more do you want?
Twin 6262's or similar are about all that fits in similar space w/more power.
Once you swap to the CT5 w/bb the price goes way up...that's why I went to a fresh used GT47r vs trading/upgrading my 8079.
You should be able to get it into the mid 9's if desired an it's not too heavy.
What's the vehicle and what more do you want?
Twin 6262's or similar are about all that fits in similar space w/more power.
When is back pressure too much? My answer to that is when you turn up the boost but the Hp does not increase. The boost pressure may increase but it's not a true boost increase as the excessive back pressure is pushing back into the intake side causing a false boost reading.
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I hope so, I've been stuck in the 10s for sooo long. Always some issue at the track. It went 10.4 at 134 with the tc78 and no suspension or t brake. I have about 150whp more now and qa1s with the brake. Hopfully I can get some clean passes.
When is back pressure too much? My answer to that is when you turn up the boost but the Hp does not increase. The boost pressure may increase but it's not a true boost increase as the excessive back pressure is pushing back into the intake side causing a false boost reading.
This is how myths are created. That is an incredible theory though. LOL
Here straight from DrTurbo http://www.yellowbullet.com/forum/sh...88&postcount=3
Last edited by Nitroused383; Apr 25, 2012 at 04:30 PM.
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Id be down for that. Some one has to have tested bp on a 347 or 370 running a gts 76. I think the power is right on with the 76gts, right. 17 psi 777 whp through auto and 9 inch. Would a gts really do more?
I made 720 rwhp through my 76GTS with 11.5lbs of boosst on a 346. Through a 9" and on slicks but mine is a 6 speed. I will try to log back pressure this year. NicD made 810 rwhp on 15.5lbs of boost on a low compression 347 with the 76gts.
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I don't really think there is going to be much of a difference in power from a 370 to 346 so 346 results count to.
Thanks for posting those results. I'm still on stock,241 heads that are mildly ported. The gts is a bad **** for sure. Id love to,see bp results
Thanks for posting those results. I'm still on stock,241 heads that are mildly ported. The gts is a bad **** for sure. Id love to,see bp results
yeah i would just like to see the pressure differences. i just dont think the gts would be at those levels down by 10psi, perhaps it is, i dont know
i will get mine tapped and tested. dont know how relevant it will be though since my heads are worked over alot and i think mh cam is a bit bigger
i will get mine tapped and tested. dont know how relevant it will be though since my heads are worked over alot and i think mh cam is a bit bigger