monsween Posted January 3, 2009 Share Posted January 3, 2009 When going BPU, whats the boost value. I mean on stock its 0.7bar then 0.8bar on the seond turbo So bpu with RR in is 1.2 all the time or 1.1 then 1.2 etc etc Cheeeeeeeeeeeeeeers Link to comment Share on other sites More sharing options...
Scott Posted January 3, 2009 Share Posted January 3, 2009 Around 0.8 and 1.1-1.2 max As far as i know there is a way to get the 1st turbo to put out 1.2 bar too. Not sure how many people do it though. Link to comment Share on other sites More sharing options...
hiten55 Posted January 3, 2009 Share Posted January 3, 2009 oooh i didnt know you could do that... sub'd Link to comment Share on other sites More sharing options...
Scott Posted January 3, 2009 Share Posted January 3, 2009 oooh i didnt know you could do that... sub'd Yeah there's a guide. Involves putting an MBC (or ebc i guess) in one of the vac lines at the back of the engine. Don't know the technical speak for it all but there were pics involved lol. Link to comment Share on other sites More sharing options...
monsween Posted January 3, 2009 Author Share Posted January 3, 2009 so a bpu soop is just the same then u get a bigger surge after 4-4.5K Link to comment Share on other sites More sharing options...
hiten55 Posted January 3, 2009 Share Posted January 3, 2009 Yeah there's a guide. Involves putting an MBC (or ebc i guess) in one of the vac lines at the back of the engine. Don't know the technical speak for it all but there were pics involved lol. great i'll do a searchy-type-thingy Link to comment Share on other sites More sharing options...
Scott Posted January 3, 2009 Share Posted January 3, 2009 so a bpu soop is just the same then u get a bigger surge after 4-4.5K Yup basically. I think you get 0.1bar more on the 1st tubby though. Link to comment Share on other sites More sharing options...
hiten55 Posted January 3, 2009 Share Posted January 3, 2009 i thought it made a difference in power delivery too? Link to comment Share on other sites More sharing options...
monsween Posted January 3, 2009 Author Share Posted January 3, 2009 cool cool. Thanks for the answer Link to comment Share on other sites More sharing options...
Scott Posted January 3, 2009 Share Posted January 3, 2009 i thought it made a difference in power delivery too? Not sure how i would describe it. I guess the jump from 0.7 to 0.8 and then to 1.2 would be the difference in power delivery? Link to comment Share on other sites More sharing options...
hiten55 Posted January 3, 2009 Share Posted January 3, 2009 it felt more raw when i drove mine, mind you it was half way through its bpu conversion at the time so not sure how the end result is... Link to comment Share on other sites More sharing options...
merckx Posted January 3, 2009 Share Posted January 3, 2009 All you're doing is increasing the maximum boost value that you can achieve which is approx 1.2bar for BPU. You control how much boost you get with your right foot, so it can be anything from 0bar to 1.2bar. At BPU you'll find that the engine is very much more responsive, you'll definately notice this when accelerating hard away from a standstill position. An unmodified Supra is relatively subdued compared to a BPU car which is a different beast altogether Link to comment Share on other sites More sharing options...
hiten55 Posted January 3, 2009 Share Posted January 3, 2009 At BPU you'll find that the engine is very much more responsive, you'll definately notice this when accelerating hard away from a standstill position. An unmodified Supra is relatively subdued compared to a BPU car which is a different beast altogether spot on description, thanks Link to comment Share on other sites More sharing options...
matt k Posted January 3, 2009 Share Posted January 3, 2009 Around 0.8 and 1.1-1.2 max As far as i know there is a way to get the 1st turbo to put out 1.2 bar too. Not sure how many people do it though. Are you sure? I know you can run the car TTC but this just does away with sequential and runs the turbos in Parallel giving you slightly less low down and a bit more middle. Link to comment Share on other sites More sharing options...
Mcgoo Posted January 3, 2009 Share Posted January 3, 2009 (edited) Yeah there's a guide. Involves putting an MBC (or ebc i guess) in one of the vac lines at the back of the engine. Don't know the technical speak for it all but there were pics involved lol. Interesting read, see here; http://www.max-boost.co.uk/max-boost/supra/boosting_the_beast.htm I believe this is JohnA's website. Edited January 3, 2009 by Mcgoo Aknowledgment of JohnA (see edit history) Link to comment Share on other sites More sharing options...
Scott Posted January 3, 2009 Share Posted January 3, 2009 Interesting read, see here; http://www.max-boost.co.uk/max-boost/supra/boosting_the_beast.htm I believe this is JohnA's website. Thats it mate, thats where i read it. "Low RPM boost" Link to comment Share on other sites More sharing options...
Scott Posted January 3, 2009 Share Posted January 3, 2009 Are you sure? I know you can run the car TTC but this just does away with sequential and runs the turbos in Parallel giving you slightly less low down and a bit more middle. Interesting read, see here; http://www.max-boost.co.uk/max-boost/supra/boosting_the_beast.htm I believe this is JohnA's website. Yup, have a read. Thats why i said i don't know how many people have given it a go. Its pretty unknown on here. Link to comment Share on other sites More sharing options...
Guigsy Posted January 3, 2009 Share Posted January 3, 2009 very interesting. Id be interested to hear what someone like CW thinks about this Link to comment Share on other sites More sharing options...
Scott Posted January 3, 2009 Share Posted January 3, 2009 very interesting. Id be interested to hear what someone like CW thinks about this In principle its a sound theory. Basically all you are doing is upping when the 1st turbo's "wastegate" opens the same way as you do the 2nd turbo for normal BPU. I think if you set the 1st turbo at 1bar and the 1st and 2nd turbo at 1.2 bar then you are evening up the work done by each turbo. By just increasing the 2nd turbo for BPU levels you are making it work much harder to reach the same level. Link to comment Share on other sites More sharing options...
Guigsy Posted January 3, 2009 Share Posted January 3, 2009 well my car pulls 1 bar (or very close) through the first turbo anyway if i remember corretly. Maybe something to do with it being a uk car and not running a boost controller? Although obviously like the idea of running 1.3 bar through both I guess doing that you wouldnt get the surge from the 2nd turbo as much then? Link to comment Share on other sites More sharing options...
Scott Posted January 3, 2009 Share Posted January 3, 2009 well my car pulls 1 bar (or very close) through the first turbo anyway if i remember corretly. Maybe something to do with it being a uk car and not running a boost controller? Although obviously like the idea of running 1.3 bar through both Possibly the boost gauge? Would be surprised at getting 1 bar without a controller. U got a double de-cat? 1.3 at both stages might be an uneven balance though. I think in order to have both turbo's flowing the same amount of air, at the 2nd stage, i think there will always have to be a difference between 1st one on its own and both turbo's running. Link to comment Share on other sites More sharing options...
Alex Posted January 3, 2009 Share Posted January 3, 2009 Look up "Blue Spaghetti" Link to comment Share on other sites More sharing options...
Scott Posted January 3, 2009 Share Posted January 3, 2009 Look up "Blue Spaghetti" Yeah it does look a bit daunting. Reckon it would need to be done with LOTS of gauges monitoring everything. Link to comment Share on other sites More sharing options...
Guigsy Posted January 3, 2009 Share Posted January 3, 2009 Possibly the boost gauge? Would be surprised at getting 1 bar without a controller. U got a double de-cat? 1.3 at both stages might be an uneven balance though. I think in order to have both turbo's flowing the same amount of air i think there will always have to be a difference between 1st one on its own and both turbo's running. To be honest i havent looked for a while Maybe im just exagerating in my head . Yep the car is fully bpu. all apart from a boost controller. doesnt seem to need on as it tops out on boost at about 1.3 and then if you keep your foot in stops at 1.4. I remember hearing somewhere it was because its uk spec and something else limited it :S Link to comment Share on other sites More sharing options...
Alex Posted January 3, 2009 Share Posted January 3, 2009 Nah it's easy, and you still only need a WB02 and Boost gauge tops. It works fine but when Ian and I experimented we found that overboosting the 1st turbo did little or nothing for the feel of the car, so as the arse dyno wasn't impressed it was removed. IMO leave it alone as it add nothing. Link to comment Share on other sites More sharing options...
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