RESPerformance

Got a smoking deal on a SiR-G short block Darton sleeved 84mm bore Eagle Crank Eagle rods Cp 9:1 pistons im wondering if it really matters if i throw a vtec head on. Reason is i have a flow benched ported crower spring and retainer with crane turbo cammed ls head its fresh has skunk 2 intake 70mm tb. My gsr head is stock just valve job thats it. I know everyone has a vtec vs. non opinion i prefer non myself. If im only shooting for 550-600whp does it matter? I have a Precision 6262 drag log manifold 3" dp hondata.

My b20 in my crx currently is in the 11s but its stock rods and bolts nippon pistons oem hg with that built head on it i dont want it to come apart its inevitable. Im at 15 degrees timing and 11.1 afrs on e85 yes i realize thats retarded rich and no timing i tuned conservative. In my opinion my SiR-G is exactly the same as my b20 just forged obviously u vtec faithful may think its blasphemy to each their own. I cant believe how much the short block costs to get done. ive been goin fast (enough) lOl for years on oem engines with studs.

92frostwhtdb2

Vtec at the end of the is just the ability to switch between two different cam profiles,one geared towards to gas mileage and driveablity the other high rpm performance,so throwing the first two out the window being a highly modified platform,it all comes down to flow.I dont know timing belt you would use seeing as how the non vtec head is shorter. i did see something like this done with a ls head and b16 bottom end a while back tho.

Bseriescivic5

if you have both heads, put the Vtec head on.... bottom line, flows better from the get-go and it makes the timing belt issue easier (unless ofcourse u just want to make it difficult on yourself). 600whp is def possible with ls head, but a whole lot more?? prob not.

RESPerformance

Belt is easy use gsr water pump and tbelt and id love to show that a stock vtec head will outflow a built ls head with cams n intake manifold

RESPerformance

I know stock for stock vtec flows more. I just dont wana go shell out over a grand for a head package for vtEc

MR.johnson

It's your car do what you want, but I would run a Vtec head.

Turbo-LS

iTrader: (4)

Blah Blah everyones a hater, plenty of people making good power on non vtecs. I personally ran both yes vtec makes more power per psi boost on a given turbo setup. But that doesnt mean just completely rule out nonvtec geez people.

if you plan on running cams in the ls head you should absolutly run a gsr timign belt and water pump, the stock 19tooth water pump over 7200 ropm cavitates the crap out of the coolant and you will get false overheating conditions and hot spots on the sleeves and in the head.

if you want to know more on cam choice and other options you have with the non vtec Pm me

92redhatch

Go vtec don't waste your time on that non vtec crap.

RESPerformance

Apparently u didnt read my post then saying id waste my time im only going for 5 to 600 i already have a built ls head w cams intake tb

RESPerformance

Already have oem wpump greddy tbelt spoon gears endyne type r oil pump studs for either head ls vtec dowels if i want non vtec (flip em) would just need to plug spot in block

cibao2ner

ls has 31mm intake valves...vtec has 33mm intake valves...a valvejob and itr cams and the ls head wont keep up....even the ls rockers are not desigh for high rpms like the vtec rockers...anything over 300whp wants to rev to 9500....

Bseriescivic5

Slap the LS head on and go then.... your mind seems to be already made up in that pathway anyway.... You stated that you already have BOTH heads correct? so we are just looking at your situation objectivly..... so go with what you want (LS head) and see what she does. Bottom line, your built LS head is going to flow more than the VTEC head (its all stock right?) but as soon as you put a set of cams and a mild valve/ port job on the vtec head.. its going to out-flow the non-vtec head very quickly.

RESPerformance

Also wondering what turbo to use i have holset h1c and precision 5252e billet wheel stage 5

Might just run the non vtec temporary see what it makes and if not what i want ill build a vtec head. I was looking at blox for full head package.

RESPerformance

Im a very indecisive person lol i always wonder what if and im always trying to be different pretty hard in a honda all my buddies are hating on a non vtec sir g may dO it outta spite prob be the highest hp one ever i can almost sAy that with 100% certainty nobody else would make a bastard setup outta a sleeved vtec block lol

TheShodan

iTrader: (14)

I didn't understand a thing you said in this last post.. please clarify?

LightningTeg

ditch the log manifold and you can make 600 with E85 or race gas if your head already has work done.

The biggest advantage is the 33mm intake valves. A PR8 with the right cams will come damn close I think. I'll do it eventually and post dynos.

Already made over 500whp on pump gas with my setup on a stock ported Pr4 head but it took alot of boost. And no I did not rev past 8500 to do that.

RESPerformance

Just purchased a full race ramhorn working on my g23-2b-turbo currently putting this on hold for now

sanman000719

whats wrong with a log manifold????

RESPerformance

Ya im no expert and fyi i didnt buy my full race bc they said so haha.
Ive made plenty of power multiple different engines i like the drag manifolds

Only thing i could say is the runner length and velocity would be better on a tubular
It may be just like a vtec vs. Non vtec arguement tho lol

RESPerformance

Ya im no expert and fyi i didnt buy my full race bc they said so haha.
Ive made plenty of power multiple different engines i like the drag manifolds

Only thing i could say is the runner length and velocity would be better on a tubular
It may be just like a vtec vs. Non vtec arguement tho lol

sanman000719

i made 600 on a log there good