Wow, that is awesome Nick! :cheers:

I was pretty much sold already on you building me a 422 for my ATI blower instead of an all-bore 382. I think this just about completed that decision!

Belt slippage at 7#, huh?

We might have some problems running 11-12# on my 422 if we stay with the 9:1 CR that we discussed.

Be sure to keep us posted on possible solutions to that problem. :yesnod:

 

I assume this is using a D1. Very good #s especially considering the boost #s. I can only imgagine if the compression was lower and about 12lbs. of boost. Like Chris I would like know about the fuel system and programming. I've thought about selling mine for a C5 a 382 all bore motor and a D1 would make for a interesting setup. Keep up the good work :cheers:


[Modified by 93Polo, 4:25 PM 2/15/2002]

 

Great #'s

1) What cam are you guys running? Roller? If you cannot give the specs can you give the general duration and split (how many degrees is it split)? What springs are using? Done anything "speacial" on the exhaust flow?

2) On a 10.2 you seem to be building in a limit on the boost. Is this for head lifting concerns at higher boost levels?

3) Anything special done to the heads or block to seal 'em (ie, oring gaskets, cooper (naaa :D ) or oringed block or heads?? Hmm I guess probably not since it does not look like you will want to go over 10# without some added ocatne.

4) Is this with the LS6 mani? Any plans on trying it out with the holley alum. mani??

5) using the 85mm maf and ported tb??

6) on the belt slipping are you guys going to put on the 8rib belt? Or what is the slippage soulution?? Is the crank keyed??

thanks :D

 

:eek: MAN THAT"S AWSOME POWER :eek:

 

Quick update on a few questions:

We are using the D1 head unit and was a "tunner" kit, pcm is factory with a custom program. The fuel system is a prototype that we worked on in the past few weeks and hols 60psi so far?We will see how things fair when it starts to make the power levels we are shooting for.

The engine is our standard set up with hydraulic cam and stock rockers, it is a Zo6 and has 6.0 heads(our stage 3 boost setup). The heads have 2.08x1.625 valves and have a good int/exst ratio. These heads have all the standard parts that our stage 2 and 3 heads have except for the severe duty valves. Cam is mild and passes emissions with a split duration and lift. The car came in with the NA set up at 11.5 comp and we changed the Z06 heads to the LQ9's for the drop in compression, we also are using a special gasket we have been working with as of late and increased thickness to help drop the comp.

We are only shooting for 10lbs on pump gas(should just make it + - 1lb) and should hold to 12 if we want to put some good gas in at the track.

We are using the LS6 intake an will be testing the holley next week on another ATI package at 12lbs with 9.0 comp.

We origionally had run with the crank not keyed and just finished up keying it right now, the balancer did look like it was just starting to turn but not much. We will see after we go back on the dyno, I think the belt is the issue but keyed it just to makle sure we are covering all the bases.

More info soon

 

Great numbers Nick!!


To the Pro charger guys and others who don't think the crank needs to be keyed! I think this might just show you why it has to be!!!

 

:lol: :lol: :lol: :lol: :lol: :lol:
could not have put it better

 

We just made another pull, made a bit more but we have some definate belt slippage! looks like Monday and back to the grind? :D

 

Time for a ribbed belt. :D

 

Nick, when is my 750rwhp coming :D

 

Nick I also would like to know, 427 SC or 427 TT? Cost, Performance, and reliability. What is your opinion on these 3 issues?

 

Great numbers Nick. :yesnod: :cheers:

 

I can do it for you, just send me a couple of ben franklins and I will make them grow for you :D

Wow those are awesome #'s. This Ati kit seems to be the real deal :eek: If only we can solve the slipeage issue it would be perfect :yesnod:

 

700rwhp would be great without NOS.

427 + SC or TT is in my future!! :D

Michael

 

AWSOME........ :smash:

 

Awesome ! :cool:

The 7lbs kit are supposed to give you about 55% more power on a stock engine (345->535hp). Most 427 C5R's is around 580hp so with 7lbs boost you would in theory have 900hp :eek: :D

900hp may be a 'little' to much for most of us ;) I assume it would require a better fuel system, transmission, rearend and so on.

Even with a low boost at 2.5lbs you would have 694hp, I assume it would be possible to run that kind of boost on a 10.5:1 compression engine.

Could someone chime in and tell if my assumptions are correct. Maybe there are a ATI kit in my future :yesnod:

:seeya


[Modified by seanr, 2:12 PM 2/16/2002]

 

418 L/C 9:1, Nice cam, 15lbs ATI Cog System :D 800 rwhp

 

seanr,
No, unfortunately, it doesn’t work like that :nonod:

In theory for every 1bar (14.7psi) you double your HP, but that’s only in theory….
You have to consider the efficiency of the blower/turbo as well as your motor.

For example after certain power level LS6 intake cannot flow much more, so your boost will raise up, but HP will stay pretty much the same.

Or if your blower/turbo unit has reached its efficiency limit (at a certain flow), running more boost would cause the air charge to heat up significantly and you won’t be making “extra” power.

Also remember that there’s some HP required to drive the blower and a blower motor (low CR, different timing, etc.) doesn’t make as much HP as it’s NA equivalent.

As far as running 2.5lb of boost I don’t think it’s a good idea. You probably won’t be making any significant power, because most compressors are designed to flow certain CFM as a certain boost number (compressor maps) and at 2.5psi I’m afraid it maybe me minuscule.

Hope this helps.

 

Thanks Eug.

ARE hopes to get 700rwhp out of their setup, that should equal about 825 crank hp (my simple calculation was 900hp) This equals to a power increase of about 52% at 7lbs assuming standard 427C5R with 580 NA hp.

Is there a formula what can calculate the power increase at half the pressure (3.5lbs) ? I was hoping it would be as simple as divide by 2
:bb

:cheers:

 

You will get approx. ~30hp/psi. My 422 should make about 500RWHP. On 5psi of boost from a good twin turbo setup it should make about 650RWHP.