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Old 28th March 2007, 02:59 AM   #21 (permalink)
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i tell a lie, i've just checked the invoice and rod went for 800cc, at a cost of £480 reduced from £540, but i'm not sure which brand
glad i checked!

....muppet
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Old 28th March 2007, 12:38 PM   #22 (permalink)
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i think i'll go for 800's as well, just to leave an extra margin of error.

Is there any downside (apart from maybe cost) from running bigger injectors than needs be?
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Old 28th March 2007, 01:05 PM   #23 (permalink)
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The only down side to running big injectors as far as I'm aware of is when the engine is at idle the duty cycle will be very low(in my case 1%-1.2%). This may lead to emmision problems when it comes to MOT time, if you catch my drift.
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Old 28th March 2007, 01:12 PM   #24 (permalink)
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rod bell specced 720cc injectors for my rb30 with 28/60-7's, and we'll be running 1.5 bar when run in, also tomei fuel pump, standard rail, pfc dJetro so no afm's, so 720 should suffice?

gav

Why only -7's with an RB30 ? thought those motors were good for 1000+hp ?

would have thought that a much bigger turbo would have gone on there nicely ? however the spool rate on those will be extremely good with the extra engine capacity....
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Old 28th March 2007, 03:47 PM   #25 (permalink)
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spool time; everything's relative

yes the OS lump is good for 1300ish, and the increased capacity will aid spool time, but a bigger turbo will always lag more than a smaller one.
many big power cars would struggle to overtake a tractor on a country lane as they won't hit a straight long enough to get the turbos spinning
my aim was to build the best possible point to point spec skyline, for real use on real roads.
for this i required the smallest turbos i could get away with, without them overspeeding at high revs
add to that there is a limit to how much power you can deploy on the road; i would venture that my car with 620ish would be quicker than cars with 800, 1000bhp etc due to faster spool up (instant) and 620hp being about as much as you can really make use of

so in essence i've chosen driveability and real world speed over big numbers and big lag

with the bonus that my boost gauge now doubles as a throttle position switch....

gav
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for sale, all from my R32 GTR:
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standard R33 GTR 17" rims, powder coated matt black, £400
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Old 28th March 2007, 04:14 PM   #26 (permalink)
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yes but -7's are only good for 5-530bhp ?

620hp is for the -5's...
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Old 28th March 2007, 04:15 PM   #27 (permalink)
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turbo lag's easy to get past - I push in the clutch, slam the throttle, drop the clutch - no more lag
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Old 28th March 2007, 04:22 PM   #28 (permalink)
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no more clutch either LOL
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Old 28th March 2007, 05:25 PM   #29 (permalink)
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yes but -7's are only good for 5-530bhp ?

620hp is for the -5's...
thought the -7's were the bigger ones...

bugger, wrong twice in one thread!

all i know is mine are the larger type, aka disco potatoes and good for 620ish

guess i should stick to ranting....

gav
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for sale, all from my R32 GTR:
nismo s-tune adjustable shocks, 1 month/1000 miles use, £650

standard R33 GTR 17" rims, powder coated matt black, £400
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Old 28th March 2007, 05:30 PM   #30 (permalink)
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lol yep -5's they will be...

i have them on mine and yes you will be very impressed - they work real well on mine which has 2.7L but with 3.0L they will be mint
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Old 28th March 2007, 06:50 PM   #31 (permalink)
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Pete, when does your second pump go in? Have you figured out how to drop it in? I suppose a simple vertical bracket can be bolted up, and just have the pumps attached to the thing....

I am praying mightily, mightily I tell you, that a 2nd pump solves all fuel pressure problems, feeds the poor, and brings about world peace
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Old 28th March 2007, 07:17 PM   #32 (permalink)
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Cradle

What about making another cradle for both pumps, shouldnt be hardto do and can then be put in the tank and slipped into the original location...
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Old 28th March 2007, 10:54 PM   #33 (permalink)
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lol yep -5's they will be...

i have them on mine and yes you will be very impressed - they work real well on mine which has 2.7L but with 3.0L they will be mint
i'm still running everything in @ 1 bar and 5000rpm limit

but i've done 2000kms now, so it's back oop north for the full monty, just as soon as i finish up the interior with adrenaline. hopefully be done by the end of the week

gav
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yes, that would be my big stick

currently spinning: red seal- black ops


for sale, all from my R32 GTR:
nismo s-tune adjustable shocks, 1 month/1000 miles use, £650

standard R33 GTR 17" rims, powder coated matt black, £400
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Old 29th March 2007, 10:56 AM   #34 (permalink)
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Pete, when does your second pump go in? Have you figured out how to drop it in? I suppose a simple vertical bracket can be bolted up, and just have the pumps attached to the thing....

I am praying mightily, mightily I tell you, that a 2nd pump solves all fuel pressure problems, feeds the poor, and brings about world peace
Just securly attach it to the pump that is in there, some strong tie wraps will do the job just fine... the hard bit is getting the new line into the tank to attach to the pump.

Personally, Im hoping that the FPR will be the problem and i should know that in a couple of hours.. will post again soon as i know.

Im 100% sure a 2nd pump will sort it if not..

Pete
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Old 29th March 2007, 12:06 PM   #35 (permalink)
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What FPR are you running just now?

Swirl pots - same as a surge tank? My car will be used mostly on track..... do you think it wise to get a surge tank system?
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Old 29th March 2007, 12:12 PM   #36 (permalink)
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Adam -looks like your going to have one hell of a car there
Afraid i can't help with your questions but i'm sure Marc will be able to help..
When are you going to brands?? -i'll try and and be there..
Cheers,
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Old 29th March 2007, 12:22 PM   #37 (permalink)
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All day on the 11th of April...

If the GTR isnt ready i'll have to do it in the old porker LOL Sold the impreza last night.
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Old 29th March 2007, 01:01 PM   #38 (permalink)
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What FPR are you running just now?

Swirl pots - same as a surge tank? My car will be used mostly on track..... do you think it wise to get a surge tank system?

Im currently running a Sard FPR, however i have recently been informed that there are 2 types - 1 is up to 450hp and the other is much more - they are both identical apart from the size of the diaphragm inside and i dont know if i had the latter or not....so this today they are trying a different FPR to see if it is the cause or not.

As for swirl pots - im not sure as to what level they are required or not, i generally tend to keep the fuel tank more than half full all the time and i would never thrash the car with a low fuel level in it so im not sure if it would have any issues with picking up only air from the tank..

Maybe someone here could advise further on the benefits of a swirl pot ?
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Old 29th March 2007, 01:34 PM   #39 (permalink)
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I've mailed RIPS to ask about there R32 tank systems.... i'll put any replies up here too
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Old 29th March 2007, 02:00 PM   #40 (permalink)
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fingers crossed for ya Pete...

as far as I know, swirl pots are basically the fuelling equivalent of oil pan baffles - to prevent fuel starvation under hard G forces. Nothing else really.

My second Apexi pump arrived today - sealed in oil and vacuum packed. Didn't know fuel pumps came like that. My Sard RJ fuel pressure regulator arrived - the size of it is huge compared to the Nismo FPR - maybe 3 times times the diameter? My fuel lines and fuel rail have yet to arrive though.

Pete, when you added your fuel lines, did you just add rubber lines under the car? -6AN, or what size?
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