13b REW calculations (turbo(s))

[rbs14a]

was running t88 34d
new turbo borg warner s475 1.32 t6

[turbotoaster]

really! thats the same turbo im going for, did you get the ETT, how much and whats your spool like?

[rbs14a]

na im not really going that big, ill never spool it im only running a big bridgeport and not using methonol
just wanted to see what figures he came up with

[turbotoaster]

oh right, have you changed turbos then, ive decided to go with a 1.1 rear end because according to a few people you see gains in spool by running e85 which i didnt know before so im thinking of loosing 500rpm in spool by running racegas instead.

they spooled a t6 1.32 on a stock port engine, hit 15psi at 5300rpm, ive got a link if you fancy reading it

[rbs14a]

you going with a 1.1 t4 then?
 
what was that on meth? in america i presume?

[turbotoaster]

nah, going with 1.1 t6....on e85 with a streetport in sweden he hit 1bar by 4000rpm
http://www.rx7club.com/showthread.php?t=804713

the stock port was also on e85, completey stock mazda engine, never opened up and had done 37000miles, ran 9sec qtrs, the funny bit is, because it was running 32psi of boost it made bar at 5300rpm and the boost was still rising up to 32psi by 8200rpm....which was good because the boost increasing wouldnt let the torque drop off so made loads of power.....even if the powerband wasnt massive
http://www.rx7club.com/showthread.php?t=816447

[rbs14a]

you running e85 now then?

[lee mills]

no diesel:rollin

[turbotoaster]

no ill be running racegas and pre turbo w/i, id like to run e85 but theres nowhere around here that sell it and id need alot bigger fuel setup than im planning which would cost to much money.

i figured c16 and 770cc of water would be more than enough

[rbs14a]

ye ok so the theroy youve based your setup is on e85 have you an equivalent on yours? e85 has very different characteristics to c16. e85 is available at most morrisons

[turbotoaster]

the only one up to yet ive found that is running race gas is a rx3 in america

he made 769rwhp at 30psi of boost on racegas.

hes running a side exit like i will.

the issue is hes running a bridgeport and thats on a dynojet.

from what i could work out, there rwhp figures are similar to our flywheel figures so thats the closest i could find.

but saying that, i also checked something on a online qtr mile calculator.

i typed in 470whp and 1200kg and it come up with 10.3@130mph which is the same power and pretty much the same terminal speed as blitzboy.

i then typed in 620whp and 1250kg into it and came out with 9.82@143mph and in real life it ran 9.85@142.99mph which tells me its pretty accurate. that car claims 620whp@28psi(which it ran at strip) and 709whp@33psi on a stock port.....all e85 again

So i dont know what to think when it comes to american dynos, i know dynojets read higher but then im shown evidence like that and it makes me wonder

[rbs14a]

does it say hes running a bridge? might sound like a bridge but it may be bigger, like i said high hp cars wont tell you everything, type in whatever you like you cant take into account real world effects and variables

[turbotoaster]

i know that mate, theres loads of variables, even if you match perfectly someone elses build it can come down to how good your tuner is, or what ecu you run.

he does say hes running a bridge, he is running on a different manifold but you can see hes not pp, he could be jport but he hasnt mentioned it or modified his intake to show it.

my aim is 700bhp at around 30psi of boost, ill be honest and i might not get that but as long as its about 660bhp then i can achieve what i need to.

My new intercooler arrives tomorow so im getting there slowly.

Not really sure which dyno to take it, ross is mapping it because hes mapped over 2bar on a power fc so hes confident we can do it, i did think about pips hub dyno as no wheelspin plus ross has mapped silverrexmans at 2.2bar on it so knows what to expect

[rbs14a]

ye but the silver snail never really produced the goods did it???

[turbotoaster]

i read the thread where it did 780bhp on pips dyno but ill be honest and say this was a year before i bought an rx7 so i dont really know what happened to it afterwards.

I just come across his thread while i was browsing fduk.

Do you know what happened as sounds like you have more knowledge on it that me