Got some questions for you guys. Other than the Mugen headers, is DC our only source for a header (5th Gen)? I would really like to get the Apex'i piece but it seems like the only application for it is for the '92-'96 Si's. I would really like to get a header but I don't really want to get DC. I've read about the SMSP (?) header but I am unsure about its progress. I guess if all else fails, I'll save and get Mugen .

For V-AFC, how many of you have seen a difference when properly tuned? Would a V-AFC be beneficial with the I/H/E set up? I hear people say that you should not mess with the V-TEC engagement that Honda sets but then again, people still do it.

I would like to get both of these items so hence the question. But I want to be smart about it and not purchase anything that's going to hurt my car's performance rather than help. Any feedback would be appreciated!

 

I believe They are both beneficial, just depends on if you can justify spending 600-1300 to get these two and tuning for 10 horses/ these r my next to steps as well/ I Would like to know more into depth.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Matrix04 &raquo;</TD></TR><TR><TD CLASS="quote"> Got some questions for you guys. Other than the Mugen headers, is DC our only source for a header (5th Gen)? </TD></TR></TABLE>

Try Greddy, i've only heard good things about them. IMO best gain to cost ratio for the headers available.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Matrix04 &raquo;</TD></TR><TR><TD CLASS="quote">
For V-AFC, how many of you have seen a difference when properly tuned? Would a V-AFC be beneficial with the I/H/E set up?
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yes the vafc is beneficial with I/H/E, but the more mods you have the more you'll get out of it. the vafc corrects your air fuel ratio, which gains performance because your allowing more air flow through your engine. But to answer your question, a properly tuned vafc will not hurt your performance at this point. I gained 6 whp with I/H/E and 1 hour on the dyno, i do however think more power can be extracted.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Matrix04 &raquo;</TD></TR><TR><TD CLASS="quote">
I hear people say that you should not mess with the V-TEC engagement that Honda sets but then again, people still do it.
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its not that you shouldn't change the vtec engagement point. you just shouldn't set it to low, the beauty of VTEC is you have smaller cams for your low end/ idle and higher lift cams for top end. to determine the best vtec engagement point for your engine, i would set the vtec engagement for like 6500 then dyno the car. look at your plot and see when the power drops off with your low cams. that is your engagement point, then tune the fuel from there.

 

 

Both the header and the VAFC are invaluable modifications. The VAFC more so than the header. I purchased my VAFC for 300 shipped, and DYNO tuned it for 180 and I got 11 horse power from the VAFC alone. So 480 for 11 horse is probably the most effective mod I've done. Of couse one must consider my other breather mod, that being CAI, and Mugen header and exhaust.

 

U must not like pulleys huh rab. Nice bolt ons&gt;&gt;&gt;

 

Thanks for the responses guys! Keep them coming!

RAB: What are your current power figures? Did you notice a significant gain with the Mugen header alone w/o V-AFC? I, too, have an AEM CAI and an Apex'i N1 exhaust.

93PRELUDEVTEC: I thought that the Greddy header was available for 4th gens only? Do they make it for the 5th?

 

greddy header can be modified. But ive never heard exactly how.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by atlprelude01 &raquo;</TD></TR><TR><TD CLASS="quote"> U must not like pulleys huh rab. Nice bolt ons&gt;&gt;&gt;</TD></TR></TABLE>
Even when it was a UR crank pulley, I've never seen a dyno where a pulley (or set of pulleys) produced significant (as in double-digit) gains...But they don't cost much so...
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">Try Greddy, i've only heard good things about them.</TD></TR></TABLE>
As have I, but no actual dynos (just some butt-dynos), so don't quote me on that. If someone could produce one, that would be nice for comparison.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">I've read about the SMSP (?) header ,but I am unsure about its progress.</TD></TR></TABLE>
PM Dave, I think he said that it's damn close to production, if not already done. I've seen (and believe) the dynos, it's gonna be real sweet and I don't think anything out now will be able to touch it's gains. The price (as quoted before) was around $1200, but I don't know if that's set in stone. I wanted one (an SMSP header), but I couldn't wait, had the cash in hand and was afraid I would blow it on something else if I didn't by my header right now, so...
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">Did you notice a significant gain with the Mugen header alone</TD></TR></TABLE>
I don't remember ever seeing a dyno of the Mugen header alone over stock, but I can show you a dyno where the header/exhaust combo gained 12 whp (and you know that the exhaust gain was probably negligable, so). I'm putting my Mugen header on this Friday, but it will be with a bunch of other stuff (ef-1 plugs, Random Tech cat, V-AFC, UR ps/alt pulleys, bored ITR tb, Hondata IM gasket, ported IM) so the subsequent dyno won't be of much help with that question...
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">I believe they are both beneficial, just depends on if you can justify spending 600-1300 to get these two and tuning for 10 horses</TD></TR></TABLE>
Let's say, just for ***** and giggles, that the Mugen header produces 7-9 whp. And I've seen dynos from tuned V-AFC's that have made as much as 15 whp (usually around 10 though), so that's between 17 & 24 whp for $1300, which no, isn't exactly a bargain, but a little easier to justify (to yourself, **** what anyone else thinks, always remember that when making a purchase).

 

Final Flash

Also remember that the mods your thinking of buying aren't that "difficult" to install.. headers and exhaust are bolt on and could be taken care of easily in a couple hours... for the cost benefit, bolt-ons are usually everyones first choice..

but then u look @ it and you spent $700-1400+ on headers + exhaust...then u think for that money I can get Stage 2 cams, retainers, springs, and valves for around that price.. why not go with that process... The labor of that is a pain imo... and if your not good with mechanics your labor cost alone at a shop would be a high ammount.. so i'd go with the exhaust and headers if your just tryin to spend a paycheck or so on the car

V-AFC is a great mod but I believe you should get other things first.. because the V-AFC basically needs 2 be retuned with each mod so you get rid of that dip in the power band.. like if you get an intake: you will have a dip in the power band and you can tune your V-AFC and even it out..

but i'd like to hear more on this subject, im sure boostedlude has gone through each and everyone one of the prelude mods known -_-)b

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Matrix04 &raquo;</TD></TR><TR><TD CLASS="quote">
93PRELUDEVTEC: I thought that the Greddy header was available for 4th gens only? Do they make it for the 5th?

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the greddy headers are made for the 4th gens but can be altered to fit. I read this in SCC, i think the feb 03 issue (power pages). it saiid they had to modify the mounting brackets on the secondary pipes to clear the sh oil pan.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Final Flash &raquo;</TD></TR><TR><TD CLASS="quote">As have I, but no actual dynos (just some butt-dynos), so don't quote me on that. If someone could produce one, that would be nice for comparison.

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they also said there was an increase in power from 4500 to redline, max power gains in the 4-5 hp range and an avg. gain of 2 to 3 hp, 2 to 3 ft. lbs of tq

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">but then u look @ it and you spent $700-1400+ on headers + exhaust...then u think for that money I can get Stage 2 cams, retainers, springs, and valves for around that price..</TD></TR></TABLE>


but without the i/h/e the cams will be almost usless...or no where near there true performance.......to have one you must have the other ......

 

Hey i just got a chikara header from a friend and i was gonna sell it but i was thnking about installing it for now. Its brand new with 0 miles on it. Any one with the chikara header or know anything about it.