I have been using some free software provided by Comp cams called CamQuest6 and others. In the provided software there isn't a HSR manifold provided in the options. There are stock TPI, single and dual plane, tunnel ram, Miniram, LT1 and others. I'm wondering what would be the closest match for the HSR. So far it seems the "standard flow" tunnel ram would be the closest match in runner size and length since the HSR is based on the tunnel ram. What do you think would be the closes match for the HSR?

 

I used the tunnel ram and it matched pretty well with what my 355 motor did.

 

could you tell me more about your car setup? 1/8 mile times doesn't match up at all with the parts you have listed in your sig. my 355 stock hsr with little edelbrock performer heads and 211 cam ,3.50 gear,3inch exhaust runs 7.8's @88 in 1/8 leaving like a baby. what was your 60ft. had to be horrible my guess. I am building a 11-1, 383 heavily ported hsr, afr 210 comp heads , jones 240,243 cam all forged bottom end, if it doesnt run 11 flat or better in the quarter, I am going to be pissed. your setup should run low 11's easy.

 

if your have 414 ci you better port the crap out of that intake, I had mike stark @cfm performance port my intake to flow with my afr 210 comp heads and after he was done there was just barely any material left for the gasket, I have to run double thick gasket, and this is on a new version hsr with more material. he flowed them as he was doing the work and said it needed that much porting.

 

First, thanks for the info about the engine software and using tunnel ram option.

Yeah this engine combo has been difficult to get consistent. The last time I ran it was on a closed loop tune that had some strange things done to it. I'm running an open loop tune and it seems much better but I haven't ran it again. I agree it should make more power than it does. The HSR is basically stock and the motor feels like it runs out of power at 5500 or so. I need to dyno it too and find out what is really going on.

As far as the run itself I am very soft on the launch. I'm concerned about the rear end and more interested in getting it tuned out right than best et. I generally leave at around 2000rpm and let out the clutch and nail it. Street tires and suspension. I believe it was 1.8 or so 60's. I had a V8 vega that ran quicker et's at almost 10mph slower trap speeds so it seems to be coming on at the top end which is what I would expect. This is a true street car that I drive most every day so I don't want to break it just for a tenth or two. But you are right, the motor combo will surely do better with the right tune and setup.

 

there is a ford nine inch in classifieds, highly recommend it, I went thru a lot of 10 bolts before the switch, it is a must at that power level.my car isn't daily driven much anymore but still has all seats and air condition so I still call it a street car.

 

are you running 6E tune maf ? heated o2 sensor ? should tune pretty easy. mine just needed timing down low and a lot of fuel up top. I just added at power enrichment till it was happy

 

the intake should not be running out of air at 5500 but it might with 414ci, orr was running his to close to 7000 rpm with his 383 I believe with no problem. I wonder if your very lean top end and it feels that way. felt same way on my 355 when I switched from tpi to hsr till I added lots of fuel up top and it came to life.

 

I originally ran the stock ECM 6E MAF setup and it did pretty good. Still had some drivability issues so I switched over to EBL speed density setup and it seems better.

I don't know what the issue is with my combo. By specs/cam it should pull up to 5800 or so. But in all fairness I really need to dyno it to know. Funny thing is power is gotten used to pretty quickly so what I feel as laying down may be fine. It would also tell me if something is truly off or not. Don't get me wrong it's a strong motor it just doesn't wind up like a 350.

Wide band is ~12.5 at 4-5500 rpm if it is correct it should be enough fuel.

 

what rpm are you shifting? my plan is at 6500 ish, thats what I told jones when I had him spec my cam for the 383. your cam could be on small side for a 414ci for sure unless you only want to run it below 6000 rpm, but doing so I think your leaving a lot of hp on table , i mean a lot.

 

At the track I was shifting at ~5800. You are probably right about leaving power on the table. This motor doesn't pull over 6k. Period.

But it is intentional. I wanted a very tunable engine combo that made an honest, net 360+ at the tires and was fun to drive. (10lb/HP) The large CI is supposed to make that goal easier without turning it sky high. I missed the mark somewhat, I think the power level was met but it isn't really an "easy, tame" motor. I'm seriously considering pulling it out, checking everything to make sure there isn't something I missed or damaged (valve or cracked piston etc) which may be hurting power or throwing things off. Then, really going for torque/street or throwing caution to the wind and camming it up. I would be happy with the power if it was a smooth running easy motor. But it's rough and has some PRM areas where it bucks a little at part throttle. So I add fuel to smooth it out and it's smelly and doesn't get but about 15MPG. If I'm going to live with those symptoms then I could surely get more power out of it.

Oh the other reason for the bottom end is a 200HP nitrous kit.

 

we have a similar N/A combo, but I guess I have a little lower comp.ratio due to I also have a blower.....

Anyway it made a hugh diffrence N/A when I ported my HSR intake, specially over 5000rpm.

I highly recommend doing it!