BOOSTMEISTER'S Power Up Journal

[BOOSTMEISTER]

[i:d7df653a5c][b:d7df653a5c]CAR[/b:d7df653a5c][/i:d7df653a5c]

1992 HCR32 GTS-T

[i:d7df653a5c][b:d7df653a5c]MODS[/b:d7df653a5c][/i:d7df653a5c]

Cat back 3.5" exhaust

14.7 PSI

HKS Pod Filter

[u:d7df653a5c]POWER 117RWKW 2ND GEAR[/u:d7df653a5c]

[i:d7df653a5c][b:d7df653a5c]MODS[/b:d7df653a5c][/i:d7df653a5c]

Turbo back 3.5" exhaust

12.6 PSI

BLITZ Pod Filter

Front Mount

[u:d7df653a5c]POWER 168RWKW 2ND GEAR[/u:d7df653a5c]

[i:d7df653a5c][b:d7df653a5c]MODS[/b:d7df653a5c][/i:d7df653a5c]

Turbo back 3.5" exhaust

14.8 PSI

BLITZ Pod Filter

Front Mount

S-AFC

Fuel Pump

[u:d7df653a5c]POWER [b:d7df653a5c]206RWKW[/b:d7df653a5c] 4TH GEAR[/u:d7df653a5c]

*After 5 hours on the dyno I was VERY happy with the 206rwkw

*I was unable to tune my cam gears so back to the dyno next week.

*It appears that the airflow meter and injectors may be maxed out.

[two40]

injectors may be maxed out.[/quote:4be045dc6e]

watsisname told me in SDU that a rising rate fuel regulator would breath some life into the injectors. Is this the case when they are running at close to 100% or do you give up and buy bigger ones?

[meggala]

all I can say is awsome.

great work cam

meggala

[meggala]

hey cam now you can go and bragg to the kiwi's :-)

[BOOSTMEISTER]

Yes Steve time to post on SDU, I'm not a show off but I think they need to know that us Ozzy's can build quick cars too.

ONARUN, There is very little point in fitting a reg as it will only help a bit and in the long run I will need bigger injectors to support a big turbo etc, is is only a band-aid solution where as a quick opporation will have it sorted for good not to mention that a good reg is $400 which is probably around 1/2 of the inj. price.

Steve, what injectors will fit in my car? What size are they now? I have heard conflicting report.

Cam

[meggala]

Cam you need 550's from an rx7 or you can buy injector s from nismo. the gtr one don't work I have been tolsd a few times only with after market computer casue of the impedance and they fire differently to the rb20 ones. my parts page has all the details.

meggala

[Birty]

How much difference is there between 2nd and 4th ? I'm guessing this is just the peak power output ? Cause I definately find in my car that it pulls hardest in 2nd also. I havn't put it on a dyno yet but it's just my observations from driving. It's only got a 3 inch cat back.

[BOOSTMEISTER]

Birty

Its really weird actually, when I had 168kw I made that in 2nd but in 4th I only made 160kw. But now I make 189kw in 2nd and 206 in 4th so now the power range has changed? We have tuned the afc really well for 40% throttle and it pulls so hard, the torque increase massively

[Birty]

Well it's good to hear, i'm still trying to get used to driving my car. But I will look about slowly upgrading it. I really think 200rwkw would be heaps, but I wanna get used to the car a bit more. I've got a cat back 3inch (I think, might be 3.5, havn't really checked) and am thinking about getting a 3.5 inch dump and front pipe in the next few months. Then eventually upgrading the rest (although i love the throaty sound of the one on there). Or would it be better getting a Front Mount First ? And have you see any good cuts on the m spec bar ? As I'm not too keen on buying another bar mainly for the risk of going to low and being a prick to get around in. Plus if I get a new bar, I wanna get new wheels and springs and do the whole lot at once.

[skyzerr33]

Cam

what did u use as the edging to the carbon mounting plate for the SAFC?

[BOOSTMEISTER]

The carbon actually sits behind the center trim panel in my car so you can't actually see the edge of the carbon.

[whatsisname]

ONARUN, There is very little point in fitting a reg as it will only help a bit and in the long run I will need bigger injectors to support a big turbo etc, is is only a band-aid solution where as a quick opporation will have it sorted for good not to mention that a good reg is $400 which is probably around 1/2 of the inj. price.

Cam[/quote:b2593e2f85]

Cam,

A decent rising rate reg' (as used by a number of 10-9-8sec 1/4 cars) is less than $400!, try under $200. Add a decent pump to handle the xtra demand place on it by raised f/press' & you can gain 20-30 or more rwkw quite safely. This exact same method has been done on GTS25t's on more than a few occassions. I'm not talking about huge f/press' & rwkw increases only mild ones. Of course the RB25DET 370cc inj's are able to flow far more than the RB20DET 260cc'ers, & in your case it's getting to the stage where even with raised press' it's maxed out anyway.

Have a read of the f/press' run by the Gibson Motorsports prep'd ATCC GT-R's in the early 90's, upto 138psi!!! & 470kw on 550cc inj's. In full race trim they sure pushed those 550's pretty hard! It'd take a decent pump to cope with that kind of demand 8O .

My reg + pump installed & fitted was much cheaper than a full inj' / pump etc.. upgrade!!! Sure you can probably reach 300+rwkw once you go 550's & bigger but you'll be looking @ strengthening internals before that stage anyway!!!

[BOOSTMEISTER]

Righty O yeh I agree now......I just had another look at my dyno chart and discovered that I am not running lean at the top end at all, I am actually running super rich....DOH, thats what happens when a "Friend" tells you the results without actually looking at the af chart (Originally I only had the HP chart with no af graph)

I have a big mother of a pump (Bosch 044) which actually builds pressure as the power increases My tuner has tried to lean it off but for some reason the s-afc will not modify the fuel at full throttle ? I also found out that my afm is almost maxed out at 95.9%

[img:c2903fdbd6]http://www.d-u-e-l.com/dyno_chart.JPG[/img:c2903fdbd6]

[whatsisname]

See there ya' go! Into the 10's (A/FR) @ peak power mate!!!

You've still got power to come!, once you lean off those peak power mixtures 300rwhp. The 044 can handle 300rwkw so you can lean on it a fair bit with xtra pressure, but the inj's can only take sooo much.

[BOOSTMEISTER]

Spoke to JMS today and they confirmed that the injectors can handle 220rwkw, however I checked on the s-afc and the afm is almost maxed out (95.9%+) May be time to discard it .....or perhaps just move it or by-pass it!

[whatsisname]

Cam,

You've got the luxury of just replacing your AFM with a larger Nissan AFM (Z32) as the 32 ECU can be reprogrammed to suit

[BOOSTMEISTER]

And thus, continues the saga...the Z32 and the RB20det afm's are the same size! only the Z32 has a different amount of pins and it reads the air flow differently.....I am still trying to find out exactly what the difference is however I am really starting to consider ditching it all together or moving it into the fmic piping!