hello,

So I'm part of a team that races in the chumpcar series and run a DA integra ls. Rules are changing for 2014 and for the first time we have a chance to add some power. The politics of chumpcar mean that we will only be able to very specific things without taking on big penalties.

So what I have determined from my math is that I can make the following happen if it's even possible:

1. Start with a stock LS setup.
2. I can freshen anything, but not upgrade to performance parts. I can do things like APR hardware or other non power mods as long as they replace an OEM part and don't cost more than 2x the cost of that part at the dealer today.
3. I can put any head on the car with unlimited work done to or parts upgraded as long as they are part of the cylinder head assembly.
4. Unlimited ECU tuning.
5. hacked factory air box with K&N
6. stock ls header, no cat, any catback.

I need the engine to last maybe 50-100 hours before a rebuild, but be reliable. Most of our races are 7-8 hours long, but we might enter a 24 hour race also next year.

I cannot use a different intake manifold, throttle body, or anything else at all.

thoughts on using a machined stock head with non-vtec cams? has this ever been done?

Somebody told my I can't bolt a stock LS intake manifold to either a B18C head or B16 head. is this true? is there any way to make it work?

I've been doing a lot of research but need help to pick a path if I can even do this at all.

how would you build and what kind of power can I get?

 

Search LSVtec and you will find TONS of info.
First off how would they check to see what pistons you're running? Cause I would try and sneak a set of ITR or P30's in there

IMO I would build the block and head like this if it has to stay stockish
LS block- balanced w/ arp rod bolts & head studs, you will need a B-Vtec oil and water pump as well)
GSR head w/ ITR TB (They won't notice its bigger)- Since you have to run a stock IM and header I would just get an aggressive valve job. You won't benefit from PnP its going to be choked anyways.
Skunk2 Pro1 cams
Can you mod injectors? If so RDX 410's
Stuff a BPi Velocity stack on the end of the stock air tube

 

I guess I should add that I don't want to cheat and I'm looking at a lot of threads.

It would never make sense to do a build the way I need unless are trying to find a way to get a VTEC head into chumpcar.

 

https://honda-tech.com/forums/showth...ain+girdle+gsr
Read

Your first post said you can use any head you want... so a VTEC head is the way to go if you want power. Putting a VTEC head on a non-vtec block is nothing new.

 

I have, there is so much I can't do listed in the thread. My point in making this thread it to get help to overcome my severe limitations.

It might just turn out that I can't run a head because I can't do necessary supporting parts.

 

What about a B20? More torque = faster! I have seen some great reports from fully stock B20's on road courses!

But for either one, I would build it the same (they are the same block and head, just different bore size):
Arp rod bolts
Port clean-up (basic bowl blend)
Valve job (nothing fancy)
Crower cams (403 or 404)
Valve springs (stock will float above 7500)
Side exit exhaust, or just the header (would a 4-1 ITR header be legal? its oem honda)

 

I don't understand. You said any head w/ unlimited mods and work. SO why can't you throw a STOCK GSR head on a STOCK LS Block?
Are you saying you HAVE to use the LS intake manifold, TB, fuel injectors and fuel rain?
Cause if thats the case they didn't free up any limitations...just re-worded it.

 

I'm unlimited within the walls of the cylinder head and get no supporting mods. No intake manifold, no injectors, no header, etc etc

I can replace OEM parts elsewhere with non OEM parts if they offer no performance upgrade. Example: I can do pretty much any timing belt.

B20 is obviously completely out of the question since it's a new block.

 

People have used B16/ITR manifolds on LS heads, so I guess you might be able to do the opposite. BUT, they did require some modifications.

 

I can do basic fitment modifications if they are not to add power.

 

LOL they "removed limitations" SIKE.

Just build the LS head. Have the IM ported and sneak an ITR TB in it and portmatch.

Its not worth the time/money to put a vtec head on with your limited "unlimited" rules.

Not trying to be a dick but if you're not willing to bend or push the rules with what I posted above I'm out on this one. I already want to hit something.

 

Get a good valve job, weld up the chambers and find the dead areas in the ports and fill them in. With the stock TB and IM you will want to work within the cfm limitations and RPM range they provide. You need to make the best of that rpm range and that requires torque and throttle response. To get more ideas look into restrictor plate engines.

If you can use aftermarket cams try to use high lift medium duration cams.