motorhead thanks for prompting me to pay attention lol. I miss typed a digit. The balancer is Innovators west 843 8 rib 10% OD at 8.125" and not 8.25. Tiny difference there but not huge. Anyways yeah. I have not pulled this engine above 4k RPMs since it hit the streets late last summer. SO yes I am sure you are correct that when pulled to 6k there is going to be a couple more PSI there. If you can trust the LSA calculators out there the pulley combo had 6k at the top of the green and 6500 would have been in the yellow as far as blower speed.

I am excited to see the final boost number with this combination of parts.

Currently running an LS3 throttle body and 4 inch intake pipe.

I can't say I'd ever be against meth. I just don't want to tune for it to be reliant upon it.

 

Here is a picture of the engine/blower combo as it sits today.

 

Hey Ron! Yeah my last log with any kind of power was at 13* and no KR. It is currently sitting at 15* but I have not beat on it at all with that timing. Figured I will let the dyno guy test that out. He thinks we're more than on track and thankfully he has a fair amount of LSA experience as well.

He knows enough about what we've done that he agreed to do an hourly rate instead of full charge and just work on what I want worked on if that makes sense lol.

I am sick of winter already. This global cooling bullshit has to stop.

 

Sounds like you will max out that fuel pump.

 

I'll be excited to see your results. I have that same cam in the aluminum 6.0 in my Caprice. I just added some new injectiors and am waiting to get it tuned.

 

Your boost shouldn't rise with RPM unless you have restrictions downstream of the blower. That could be blower manifold or exhaust system. Your boost "curve" should be flat as a table top. My last TVS rig actually "peaked" at 9.9psi at around 3000 rpm. It was around 9.5 everywhere else and all the way to the rev limit.

Most 10% o/d crank pulleys are 8". Even with that, you're still spinning it around 19,600 rpm at 6000 engine RPM. If you can swing it, you might want to have a few bigger blower pulleys available for your dyno runs.

 

Such a clean install, looks like it came from the factory that way.
If you're running a single 255 in the tank than dropping in a 450 shouldn't be too tough plus you already have a return line no?

 

I was only on 376cu, but I made 633 rwhp and 619 rwtq with my setup. I had the original 8715 cam, but not sure it's much different than the R1. Very similar to your other than the added cubes. 8" lower pulley, 2.5" upper pulley, 850cc injectors, CTSV fuel pump with dual AEM upgraded 320 lph pumps. My IAT's were very reasonable considering how streetable the car was. I stayed about 10-15* above ambient, and when I pushed it the temps would rise up to maybe 160*, but recover quickly when I was out of the throttle. I'm sure that I could have played with timing and squeezed more power out of it, but it made more than enough for the street as is. Over powered the 275 tires at nearly any speed.

Man I miss that car...

 

Unfortunately that is not really an option motorhead. The custom machined blower snout that is used for Corvette spacing only allows for the 2.45" due to space constraints.

If you look at the picture that I posted you can see how far back the 8 rib belt is compared to stock blower snout obviously the belt would be all the way out at the tip of the snout.

 

I love that video ryeguy. was bummed to see you sold your car. Hopefully the new owner is enjoying the hell out of it and taking care of it.

 

I'm not a Corvette fuel system expert by any means. I feel like I've heard there can be complications adding too big a pump to the factory bucket in the tank. This can lead to it's own starvation issues. There are kits that will get rid of the bucket and hang a pump or even duel pumps in the tank which has its own idiosyncrasies. I still think I'm leading towards doing something external and just leaving the stock tanks alone for now. Whether it's an inline pump or a surge tank.

I have a funny feeling that I am going to learn more about this in the not too distant future whether I want to or not lol.

 

Can't keep them all. I needed something bigger and am really glad I found a Nomad. Always been a dream car of mine.

 

I'd go with a surge tank if it were me, seen a lot of guys use those with excellent results and I've always wanted to try one, just never needed to unfortunately.

 

I’ll guess 600/650 hp/tq
😊

 

lol Ron has been disqualified from the guessing game due illegal insider trading information.


Had a great time yesterday even though it was relatively short lived haha.

I will start off by saying that this car sounds flat out nasty when you pour some RPMs into it.

Dyno guy wanted to know why I had never really ripped this thing past 4k rpms. I said because there is a lot of wheel spin and I don't trust the fuel system.

We got about 2.5 runs in on the day before we shut it down as proceeding would be futile.

First hit was met with a lot of wheel spin on the dyno. Let tires warm up a bit and sprayed traction magic on the tires.

First real hit is in red on sheet. Right off the trailer. All he did was review the tune in my own laptop and he was impressed I hadn't made a complete mess out of it (also told him I did have some expert tutelage along the way). Left timing where it was. Never messed with it. Will add more in the future.

604hp & 646 Torque going lean above 5500.

Second hit in blue on sheet was a repeat of the first with some tire spin but this time we actually watched the mechanical fuel pressure gauge.

No good. Fuel Pressure drops to 30psi and this tanks the Injector duty cycle.

Will start with fuel pump mods first and then look into injectors.

He didn't charge me much for the attempt and he didn't really want to tinker anymore with the tune at that time especially if we're going to change injectors so that would minimize any potential rework.

So yeah, I'm not mad, I'm not disappointed. Good times and I can't wait to go back and see how close to 700 we can get on pump gas.

Also because I'm an idiot and I failed to mention this in this thread and I failed to mention it to dyno guy until after the fact, this car has a pair of generic magnaflow or blowmaster mini cats just after the collectors. He pretty much said those need to go before you bring the car back. It's too risky leaving them in especially since we are way way over what they were ever rated for. So it looks like I'll be welding in a pair of simple resonators to replace the cats.

He figures if those mini cats weren't on the car yesterday the power would have been up 20 to 30hp even with the fuel system deficiencies.

It could be a couple of months before we get this sorted so be patient with me.

I do have some video of this deal but it's currently trapped on my sons iphone and he's not here.

 

Holy **** guys sorry about all the words.

For the TLDR crowd. Made 604hp and 646 Torque running out of fuel.

Needs fuel pump upgrade and possibly injector upgrade.

The end.

 

Being that it's a 97 you can't just swap in a C6 Z06 assembly but you can still do a Fore hat with twin intank pumps or use an aux fuel pump tapped into the tank and not have any problems. Since the Corvettes have two saddle tanks you can still run it relatively low on fuel (down to a 1/4 tank on the gauge which is really 1/2 tank on the driver side) and not have a problem in general. Hell I have triple 450s in tank on my car and it's a non-issue.

 

Nic thanks for the info. Always appreciated and try and learn from everything posted.

That being said, holy ***** that Fore hat is worth half the value of my entire car lol. Sarcastic I know but that is way out of my budget. I understand the logic of have to pay to play so don't get me wrong there.

Definitely looking into all the possible options.

Also I know this sounds kind of stupid but I want to have the ability to runs this car down near true empty. This car will and does see some cross country drives and playing russian roulette on running out of fuel due to modified intank pump setups is something I'd like to try and avoid if at all possible.

Nothing is set in stone at this point but I'm leaning towards putting something together that will either tap into the drivers side tank or possibly a small surge tank setup.

 

You can run it down to damn near empty and not have any problems if you drive it nicely, just don't plan on going WOT with any setup capable of supporting that kind of power on empty. The most cost effective solution is tapping into the driver side tank with an aux fuel system. Don't bother with a surge tank setup.

 

Thanks for the advice Nic. I've got to make a decision and stick with it. This is the route I am going to go for now.

The start of the foundation had begun. I bought one of the ECS fuel blocks that sandwiches between the pump module hat and the tank opening with a 8an feed and 6an return. Never been keen on just boring a hole in the bottom of the plastic tank and ramming NPT threads in there with glue hoping for the best.