MY OBSERVATION= on the thunder racing website, part NO.61-91506201 appears to be a complete HSR set-up with 42pph injectors for $2414.99.

MY QUESTION= does the "575-670hp" indicated with that part number mean-
1.it makes that much HP bolted to a stock engine
2.it is best matched to an engine already making that range of HP
3.its capable of pushing that much HP with other mods as well (if so, what other mods would it need for those numbers?)
4.none of the above

 

Well obviously #1 is false. I WISH i could just bolt it to my LO3 and get over 500hp LOL.

#2 I guess would be partially correct. The HP numbers they are giving you are based off of the pph of the injectors. Its saying the unit itself can support around this HP level, so if maybe you had a carb engine that made these HP levels, then yes this would match that particular engine if you wanted to go EFI.

#3 Yes it would be capable of pushing that much HP with supporting mods. Don't expect it to be cheap tho. Do a , there are an uncountable number of engine build-ups on this site, with an uncountable number of combos.

 

I don't think a HSR is going to make much over 500hp on a n/a setup to be honest. Theres just so far you can go with a 1205 port, and a small diameter runner.

-- Joe

 

With a good porting and matched gaskets, sure it would be close, but he wanted to know if it was Capable My LO3 is capable of 500HP, but with a helluva lot of mods and money

 

well that settles it! clearly the best performance mod is window tint

 

You bet. window tint makes our cruisers faster. Helps deflect some of the air over the lightbars..

-- Joe

 

i thought it also kept a fresh supply of ATF/FBI fluid in the muffler bearings?

 

Well we stopped using ATF fluid, and switched to BATFE fluid.

We tried upgrading our cars to HSR's, but for some reason they wouldn't bolt up to the 4.6 engines under the hood. I'll have to get back to you guys on that one.

-- Joe

 

I made 481 HP NA W/ 8:5:1 compression and a 65lbs injector. I think it's possible.

 

what internals did you upgrade to for those numbers?

i'm looking to upgrade atleast heads, cam, pistons, and install a HSR. i'm curious which combinations are giving people the best numbers.

i would do that OR start with the bottom end and go the 383 stroker route. i'd like to have some numbers and prices to match before i make a decision.

 

With the blower you mean??

65lbs injectors? I couldn't even get 42s to run right with low compression blower motor.

-- Joe

 

No that's N/A. I made 781.5 W/ a blower. check out my cardomain site at the bottom of my sig. page 4 has a link to the N/A dyno chart, look around 5800 RPM.

 

481 on an engine dyno.. so with an engine setup for N/A 500 would be possible.. this gets fuzzy, what a part is capable of changes with the setup, is the hsr good for 500hp on a 350? Or just a 406? do you want 500 at the rear wheels or crank? What rpm are you willing to spin to get that power? Hydraulic or solid cam? etc. etc..

you would need to spin a 350 fairly high to get those numbers.

a 383 with good flowing heads, a matched cam, decent compression and well setup bottom end with get you into the 450rwhp range with less cam and better driveability..

Then there is the intake.. While the HSR is a nice piece the total setup price of my converted supervic intake, plus rails, powdercoating, custom cam, ported and matched, was less than the hsr setup mentioned above..

 

481hp n/a is still damn fast. I'm hoping for somewhere between 480-500hp n/a on my minirammed motor. THen I guess I can juice it..

-- Joe

 

I am hoping for the same numbers or better on my supervic LTx.. Though the cam is not as extreme as it could be, the big dollars are in the intake and heads.

Did you disagree with any particular point I made? I don't think I said 481hp is not fast. It is fast.

 

Not at all. I've seen some pretty impressive things over the years. Like Jesse and corky's 406 setups. I think HSR on a 350 will behave differently than HSR on a 406 for sure. I know Mike Davis got some impressive numbers out of a HSR 350 car.. I'm just not a HSR fan. Ilike the miniram, and I liked my holley singleplane EFI intake even better, it just wouldn't fit under the C4 hood. And I'm not cutting up the hood

-- Joe

 

The HSR is a good economical replacement for the TPI. When I was approached to do this motor I insisted we use the HSR to show people it could make decent power with supporting hardware. I think we acomplished our goal.

 

I am not an hsr fan either.. hence the supervic. Though my setup does clear my firebird hood, because I bought a sullivans racing elbow and the equipment to adapt the ford stuff to GM... it is pretty trick looking, so I get bonus speed points there

https://www.thirdgen.org/forums/ltx-...nverted+intake

Though my intake preference is to take nothing away from 1 DwnCam's engine that is impressive and you certainly accomplished your goal!

 

That sullivan piece looks badass. Those are really popular in the 4.6 mustang crowds. Way to go