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Turbo wise, get something REALLY big if your chasing 400wkws on medium boost...T78, T88, GT42, GT45.
There's a few smart guys starting to use big turbos and getting very good results, and with nothing to facny inside the motors. Go for 700cc or bigger injectors. 550cc will max around 300wkws depending ecu configuration and fuel pressure. I wouldnt be to anal about the motor, look at its weak points, pistons and rods and flow through the head. Address these few areas and you'll be fine as long as your not over reving it. Look into a custom inlet manifold, 4in exhaust, 600x300x100mm I/C and 400wkws will be looking good. Next on your shopping list will be the trasmission... it will all break. |
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| PhiBz |
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what sort of rpm should it be limited at? 6k? or less?
would it be wrong to go overkill and go 1000cc injectors? how many pumps would be needed? is a 044 enough?
_________________ 94 ED GLi - RIP
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| tickford_6 |
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Posts: 6449 Joined: 11th Nov 2004 |
PhiBz wrote: what sort of rpm should it be limited at? 6k? or less?
would it be wrong to go overkill and go 1000cc injectors? how many pumps would be needed? is a 044 enough? the rpm limit depends on what and how well preped the rotating assembly is. if you use stock rods keep to the facotry limit. there are people spinning the atomic skinny rods and forged pistons to 7500rpm and making around 600kw the atomic 'FAT' rod is stronger again. but i would be getting concerned about the crank after 7000rpm |
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| Bert |
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An 044 pump should be enough, a V8 supercar uses one to feed ~670fwhp.
550cc injectors would be near their limit but OK, which I reckon is around the 400rwkw mark. You are more so limited by ecu selection, some don't run large injectors well at idle. |
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I havnt seen any motors running near 400wkws on 6 550cc injectors...
Is anyone getting this power from them? i would have thought 300... my 550s are at 75% duty cycle, 80psi fuel pressure and alot less than 400wkws |
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| tickford_6 |
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Posts: 6449 Joined: 11th Nov 2004 |
400rwkw you looking something like 700fwHP .
for that you need an injector able to suply about 120 HP worth of fuel. a 788cc injector @43psi feul pressure and %95 duty cycle will suply about 125HP at .57BSFC |
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| ebs_4l |
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youll be looking at 20 or so psi boost, so will be 63psi fuel pressure though
_________________ EB 4L, 8.4:1, R154, GT4202r, 4in exhaust, Greenslade Engineering exhaust manifold, plenum chamber, 90mm throttle, Garrett W2A cooler, Surecam custom, autronic SM4, Bosch 120lb, Crane HI-6, LX-92, LM-1, Turbosmart Reg, 2x bosch 044, turbosmart 48 gate. 470kw+ @ 18PSI |
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| tickford_6 |
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Posts: 6449 Joined: 11th Nov 2004 |
ebs_4l wrote: youll be looking at 20 or so psi boost, so will be 63psi fuel pressure though
63psi would see the same injector be capable of about 150hp each @ %95 duty cycle @ .57BSFC that pressure would give you the 120hp each @ %85 duty cycle |
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| Bert |
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I haven't seen any 6's with 550cc injectors. I work on roughly with a 6 cylinder of 19=19rwhp, 24lb=240rwhp, 36lb=360rwhp, and so on. Normally these have been on the limit in my past experience but some people have claimed even more power. All the examples were running at least 55psi base pressure.
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| tickford_6 |
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Posts: 6449 Joined: 11th Nov 2004 |
it's a little deeper then that though.
http://users.erols.com/srweiss/tableifc.htm#ITABLE check that link for Peak Horse Power per Injector table. it lists for a number of different BSFC (Brake Specific Fuel Consumption) because turbo engine are usualy tunned richer then N/A the BSFC is big player here. and also lists for %80 duty and %95 duty. |
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| PhiBz |
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after passin on this info to my old man we have a few more questions..
what angles are the valves cut at? apparently there are different combos.. 3 or 5? what size throttle body? what are the differences between ea/eb/ef heads? those of you who have a worked head... what cfm did it flow?
_________________ 94 ED GLi - RIP
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| PhiBz |
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cmon guys... such good info so far... dont stop replying!
_________________ 94 ED GLi - RIP
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| tickford_6 |
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Posts: 6449 Joined: 11th Nov 2004 |
the valve seat angles depend on who does the port work.
the stock 65mm tb will see a fair whack of power. but if you making a new intake manifold go with something bigger 70mm to 75mm there are port and chamber shape differences between the heads. best of going with that latest one you can find, then have it ported and cc'd |
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| FPV_GTp |
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PhiBz wrote: after passin on this info to my old man we have a few more questions..
what angles are the valves cut at? apparently there are different combos.. 3 or 5? what size throttle body? what are the differences between ea/eb/ef heads? those of you who have a worked head... what cfm did it flow? inlet and exhaust valves and seat and valves are a single cut at 45 degrees to increase flow get a 3 angle valve job and some people are even doing 5 angle seat cuts profiling valves is another method buy skinner stem valves with swirl polished heads in a good quality stainless steel set buy a AU motor ( bottom end a completely different maincap arrangment setup and if ur going to play around with 6 cylinders invest in a BA engine a beautiful 4 vavle head and not to mention a stronger bottem end four (400) hundred plus kwatts at the wheels is a big horse power figure u maybe investing in steel rods and good quality forged pistons heaps of fun i see here cheers PS have fun
_________________ WANTED - Complete BTr4 and zf 6hp26 automatic transmission 6 cylinder and V8 transmission(s) suit rebuild? Drop me a PM if you can help would be greatly appreciated - thanks |
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