This forum looks like the best place to start this thread. I have searched the archives but come up with, well, less than specific info. So by default I think this is the logical place to start. I am coming from a big block v8 drag racing background so this import stuff is new but very impressive to me. My 15 yr old son just finished his second Honda build (an EF Hatch w/b18a swap) and raced it for the first time this past weekend at a local 1/8th mile track. Obviously he wants to go faster (he gets that from my fathers son). Here's his current setup:
He did this swap himself and did a great job (soldered/heat shrunk all the wiring, aftermarket mounts, fabbed his own exhaust, cai, shift cables/linkage etc.)

Stock b18a, megan header, cai
Port matched stock intake
OBX lsd
Aluminum flywheel
2.25" exhaust (no cat)
Single nozzle N2O currently jetted @50hp (going to 100hp once he gets his 1-2 shift right)

My real question is where should he go from here? I have read that the factory intake is very restrictive but can't seem to find any dyno numbers posted indicating actual performance improvements (other than in the upper rpm ranges), How about cams? I've read that the Crower 403/404 might be a good n/a choice? How about headwork? Are there any recommendations on porting or porting templates available?

I believe his intent is for this car to be a street/strip setup but primarily a drag strip car.

Thanks in advance!

 

get rid of the ls head...... try finding a b16 or b18c head and do a ls\vtec conversion

 

This may be a stupid question but can you point me to any threads that show either flow number improvements or actual dyno#'s with this type of conversion? Would love to try this if it's actually worthwhile. Also, I should have pointed out that he most likely will turbo this setup (we have a spare t4 on the bench along w/a rrfpr, wastegate, IC and piping). I just wanted him to get the most out of the motor n/a before boosting it.

Do the vtec heads make that much difference? I realize there's a small gain when the cam switches lobes/profiles when the vtec engages.

 

PM'd

 

In my opinion, If you arent going for MAX power, the full LS setup is good enough.

While its been proven that VTEC head setups make the most power, if youre only shooting for 400s on a turbo setup then the LS head is fine. Put some boost on that thing and it will make the power.

IF you are going for an All motor setup, the VTEC head setup will be easier to max power also. You really just have to see how far you want to take it. LS all motor streetable setup will max out in the low 200s/high 100s with a fully built bottom end, headwork and cams. VTEC setup will make mid 200s.

HEad work and cams do wonders for an LS head though. You're a V8 guy, throw some wild cams with a lopey idle and you'll feel right at home. Some cams will work well with nitrous setups too. We developed our LS cams back in the late90s and we used to run 50-100 shot on our stage 2 LS 909 cam, stock block, full headwork and we'd get mid to high 12s on that setup.

Its all in what you want to do and how far you want to take it. Choose the route you think you will enjoy and go with that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ExospeedAMcrx &raquo;</TD></TR><TR><TD CLASS="quote"> Some cams will work well with nitrous setups too. We developed our LS cams back in the late90s and we used to run 50-100 shot on our stage 2 LS 909 cam, stock block, full headwork and we'd get mid to high 12s on that setup. </TD></TR></TABLE>

For now high 12's is all the faster I'd like him to go, he's 15 and really doesn't have enough seat time to even go that fast, but I'm sure that will change quickly!

Do you have any n/a cams you can recommend? How about turbo cams? For as much racing as I anticipate he will be doing, this engine won't last long anyway. He is already talking about building a "backup" LS and just needs to decide if he wants to stay n/a w/n2o or go turbo ($$)

 

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