First of all don't give me that familarize yourself with the the search button bs. We are good friends already or should I say enemies. I haven't been able to find the awnser to my questions regarding F series engines. I am aware of the power differences between the F22A1, A4, A6, B1, and B2, but why? What is the mechanical differences that account for the 125hp A1 as opposed to the 140hp A6 or the power difference between the 145hp B1 and the 130hp B2, Ect. The compresion is the same 8.8:1 in all the engines, so if it is just manifolds, cams, or something I would really like to know. Due to unfortunae events I have been inherented into a 90 CB with an F22A1, and am just assesing the situation. Thank you.

 

difference is in cam shaft design, ITM design, fuel maps, variable valve timing (vtec)

dont have such a negative outlook on a CB7, its a great car with tons of potential

 

So all the blocks are the same iron sleeved designed, begging for boost? And there is no great disadvantage in having an F22A1 if you were going to go the forced induction route other than a more restrictive head design? Cause I am weighing out the H22 vs. Turbo F22 thing. And its not that I have a negative attitude toward the CB7, i wouldn't be wasting time on a car a didn't believe in, its just that no one likes too loose a car that they chose to be put into a car that was their only option. However, it is begining to be an interesting experience, I feel as though this car is teaching me things my old car couldn't. Thanks for the response.

 

The block may be the same but depending upon the engine the heads are different and have intake and exhaust ports located in different areas. Some are SOHC and some are DOHC

If you are wondering about output the base engine for 94-97 was 130HP and the Vtec was 145 HP and the V6 was 170 HP. For the 4 cyls the MAIN reason why the EX is considerably faster has to do with the trans having a lower gear ratio vs the DX/LX models. If they used the same tranny for both car's I4's the difference in accelleration would be maybe .5 sec.(15 hp does not get you the difference in the 0-60 times) The EX manual is slightly faster to 60 than the V6 due to the extra 300+Lbs that the V6 has to haul vs the 4 cyl car

 

all in the head.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by YeuEmMaiMai &raquo;</TD></TR><TR><TD CLASS="quote">For the 4 cyls the MAIN reason why the EX is considerably faster has to do with the trans having a lower gear ratio vs the DX/LX models. If they used the same tranny for both car's I4's the difference in accelleration would be maybe .5 sec</TD></TR></TABLE>

I wouldn't quite say that the ex is .5 seconds faster (if we are talking 1/4 mile times) than the dx/lx...first of all, the gearing between the two transmissions is exactly the same...all gears are the exact same ratios, including the final drive (refrence: http://www.accordinglydone.com...s.php ) ...second, the dx might actually have a leg up on the ex just b/c it doesn't come with all the (heavy) bells and whistles that slow the ex down (motorized windows, sunroof, power antenna, etc...)...if there is a difference in acceleration between any of the models, it is very slight...

but...
back to the original question...
all of the f22a motors were in the 4th generation accords, all of the f22b motors were in the 5th generation accords and base model prelude (which actually did have a transmission with different gear ratios in it)...the f22a differences were basically in the intake manifold...the ex and se (f22a6) both had a dual stage runner design that allowed for slightly better breathing in the upper rpm's...other than that, the f22a1 and f22a6 are identical...

honda didn't release a vtec motor into the accord until the 5th generation, starting in the 94 ex (f22b1)...the vtec head is set up to run different cam profiles in the lower and upper rpm's to increase the efficiency with which the motor breathes...honda claimed that there was a 15hp and 8 ft/lb difference between the two motors...

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AbsentNissan &raquo;</TD></TR><TR><TD CLASS="quote">So all the blocks are the same iron sleeved designed, begging for boost? And there is no great disadvantage in having an F22A1 if you were going to go the forced induction route other than a more restrictive head design? Cause I am weighing out the H22 vs. Turbo F22 thing.</TD></TR></TABLE>

yes, all the f22's have been built with iron sleeves...also, you may be at an advantage with your particular motor...for a relatively inexpensive turbo project, your motors exhaust ports will line up (well enough) with a dsm turbo manifold...this means a junkyard turbo setup (for under $1000) is not out of the question...search for the dsm turbo project in the archives for more info...

 

Thank you Nick that was the kind of response I was looking for. You are very informadable.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AbsentNissan &raquo;</TD></TR><TR><TD CLASS="quote">Thank you Nick that was the kind of response I was looking for. You are very informadable.</TD></TR></TABLE>

yea man, nick is pretty much like a tank...or an old midevil castle.....

but yea, when your boosting, it makes little to no difference what F block you have.....you might look into getting teh SE itm though, if you can find one for uber cheap, it might be worth it...boosted F's are becoming a lot more popular because of the new techonologys w/ the fuel mapping, the amazing gains people get, and the fact that sooner or later the H22 stock piles WILL run out