Going to the dyno soon with my refresh rebuilt block. 60 trim turbo, new ramhorn manifold, 3" downpipe.

My ultimate goal is 400-500whp, but I don't think my head can keep up. Anyone have any idea when my head is going to be at its peak in performance? I understand a vtec head is the way to go, but that is not an option at this point.

I am at 300whp now, and if I cannot get passed 400whp on this head, I may not even retune for more power.

I am considering cams/springs/retainers, but am unsure. I have a feeling the gains would be minimal without the head being ported.

Any advice or personal experience stories will be appreciated.

 

From what I read in the past and seen from previous ls builds, your going to need cams to achieve that goal you want

 

agreed. I'd like to see what people have made on a stock head, I'm sure there is some near or over 400whp.

 

head porting, cams, port matched intake manifold.

 

grab a 63 a/r hot side, the 48 is gonna be a choke poing past 350 or so....

 

VTec head doesn't sweat 500 in stock form on itr cams. Swap it

 

you're definitely going to need cams. Isn't lightningteg on a stock port head?

fwiw you're not gonna make 500whp with that turbo anyway.

 

Stock port head is fine but you'll need cams and supporting valve springs retainers. Other than that the 60 trim with a .63 housing should net you 425-450 with a bunch of boost. The .48 housing isn't worth a damn for high Hp. Swapping to the .63 will pick up Hp on same boost level your at now

 

So you are saying you can afford cams, springs, and retainers for the LS head but cant afford a VTEC head. Makes no sense to me.

 

non-vtec cams and valvetrain tend to be a bit cheaper than vtec valvetrain and cams. plus if he decides to just upgrade the cams on the ls head all he needs is cams, springs and retainers.

If he goes ls/vtec he needs to source a head, gsr ARP headstuds and he needs to source a ls/v kit, then wire the car for vtec, oem gsr timing belt, oem vtec oil and water pump etc. it can really add up.

IMO as the old saying goes K.I.S.S

 

Stock ports PR4 head, Crower 404s and Valvetrain. Numbers in sig @ 33lbs with 62mm turbo and E85

 

I expect no less that 9000whp.

 

this is not 4chan *** hat

 

Bummer. I read elsewhere people were hitting 450+ whp on a .48 ar, but not with a honda motor, I think dsm.

I did buy a .63 ar exhaust housing while back, but when I installed it, it didn't fit. The turbine blades wouldn't spin. I only paid $60 for it too but ended up selling it. I see these housings going for $200+ everywhere which is nuts, even on ebay.

 

Because you have to buy a .63 housing that its shaped to fit the exhaust wheel . Not all .63 housings are the same.

 

buy my crower 403's and crower valvetrain. ill meet you in the west near del ridge.

 

I will seriously consider but it has to be for the right price. 253 205 9396

 

What intake manifold? If your running the stock intake and cams, good luck breaking 400 without really pushing that turbo

 

stock. I have a b18b manifold and the runners are considerably bigger than my usdm one.


What do you guys think I can make realistically? I made 293 on 14 psi on a cast iron ebay manifold. I now have a nice ramhorn manifold. I'm thinking, with the same psi on a ramhorn manifold, I am assuming I can see a good jump in power? 20, 30whp?

 

The doesnt really matter. The long runners put the power down low, along with the cams. So you'll be needing to run more boost to hit the same hp number not being able to rev the car out.

 

understood. do you believe I will gain more horsepower by swapping out my cast iron manifold for a ramhorn with the same amount of boost?

 

the head I have is ported with jge 303 cams. I think crower 404s are similar in grind. the guy who owned it before made 457hp at 23lbs of boost on a t3/t4 57 trim garret turbo. his limiting factor was fuel. he was close to maxing out his 880cc injectors.
the cams are a .417 lift and 274 duration. that was with a stock intake manifold and stock tb.

theres no reason why my head wont support 500hp+ with more fuel and boost.

so id say port it amd cam it, get a decent intake if you dont already and go at it. I believe he was running stock compression pistons.

I only want 350+ with 10.7:1 compression so my tune will obviously be more conservative lol.

400 with a stock head I think is right around where they hit a wall.


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You wont see big changes until you start really moving air.

I picked up about 50whp from going from a tubular log and 93 to a ramhorn and E85.

20lbs was 420whp, now its 470