The new Sportscar's Fastrack News made mention of classifying the 99 Si in IT.
Could it compete in ITA with the CRX's? ITB?

And in the Production class two new entrants for EP. Both as limited prep.

The 95-00 Integra GSR with a minimum weight of 2150 lbs.
Compression ratio at 10.5:1, valve lift at .450", limited suspension.

The 99-00 Civic Si with a minimum weight of 2150 lbs.
Compression ratio at 12:1, valve lift at .500", limited suspension.

A whole new life for our Hondas in the SCCA.

 

Just curious, but how would you go about making a 99-00 si weigh 2150 lbs.?

 

I'm kind of surprised at the weight. The Del Sol is at 2150 with both sohc and dohc motors. It sounds like the Si has the same engine prep as the b16 Del Sol along with the same weight.

I'm in the boonies so I didn't get my Fast Track yet. Does the prep on the gsr limit the head to IT prep rules except for cam? I would think a b18c with cr limited to 10.5 and limited lift could be made really reliable since it would not benefit from the 9k+ revs that tend to make things go boom.

Since EP roadracing cars can generally run in EP autox, that means I do have a direction to consider in a few years. An no, I don't have any illusions of beating a certain Civic in Ep, just having some fun in a reliable car.

 

Both say "cylinder head prep per IT specs except that head may be milled to acheive max. comp. ratio. Valves, keepers, valve springs, and tappets/shims to be ferrous-no titanium alloys. Valve lift measured at valve with zero lash or clearance. Stock rocker arms, cam followers, rocker ratios, and rocker/ follower ratios must be retained. Roller rockers/ followers are prohibited.

No mention of the cam other than max lift.

It's Limited prep.

 

I saw that too but my bet is that the '99 Civic Si goes into ITS where the Del Slo already is with the same engine and where the Civic EX is with SOHC Vtec. In ITA, that B16 would have too much power with the same suspension as the CRX and more weight.

In E Prod., the Del Slo is already there as a limted prep car although no proper one has been run but several are being built. I am told by one who really knows that the engine in limited prep trim can make 210+ hp honestly (which is why his Del Slo is nearly done). I think they missed the base on the weight though as Prod weights include the driver. I'll be lucky to get my F Prod CRX down to 2050 with driver (especially if you have met this driver) so no chance on getting a Civic coupe in race gear down to 1950ish legally without the driver. My bet is the weight will be adjusted up.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Eee Pee &raquo;</TD></TR><TR><TD CLASS="quote">Both say "cylinder head prep per IT specs except that head may be milled to acheive max. comp. ratio. Valves, keepers, valve springs, and tappets/shims to be ferrous-no titanium alloys. Valve lift measured at valve with zero lash or clearance. Stock rocker arms, cam followers, rocker ratios, and rocker/ follower ratios must be retained. Roller rockers/ followers are prohibited.

No mention of the cam other than max lift.

It's Limited prep.</TD></TR></TABLE>

That is right and three is no mention about duration. I had my limited prep cam ground to the max lift limit by the company that could give me the longest duration. If you can't get it that far up, at least keep it up for a long time

Engine must use stock rods but any piston that doesn't put you over on compression, max bore of .040 over, stock throttle body and intake, any exhaust system, etc.

 

I know Matt Watkins said his gsr was down to 2475 in dsp trim, and still street driven. Lose bumper structures, lights, pw, pl, pm, glass sunroof, whole interior incuding dash, sound deadening, change glass for pc. Plastic hood, front fenders, bumpers, and hatch are allowed too from my reading of the rules.

I have seen aluminum or tubular steel suspension arms for sale. I think they are also legal if they mount to the stock locations. Lose all that, add in a cage, should be fairly light. Down to the limit, I don't know. Probably not if you add in a "full fugured" driver such as myself. Possibly if adding in a more jockeylike driver. I assume scca figures it can be reached, but at what co$t?

Could be fun though. Always nice to see scca decide to add prepared/production cars that are not yet old enough to vote(or collect social security).

 

you must be smokin that other cRaCK if you think the 99 Si is going to be placed in ITA, yet alone ITB.

but i dont think the ITS del sol has truly been tested by enough drivers to say if its worthy. speaking of which, hows LTB doing with his del sol project???


Modified by Tyson at 6:16 PM 6/15/2003

 

I forgot about ITS for the minute.
I'm more into the Prod cars anyways.



Isn't the GSR a midpack ITS car?
I think I'd go Prelude for ITS. If it's gonna be a Honda.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Eee Pee &raquo;</TD></TR><TR><TD CLASS="quote">The 95-00 Integra GSR with a minimum weight of 2150 lbs.
Compression ratio at 10.5:1, valve lift at .450", limited suspension.

The 99-00 Civic Si with a minimum weight of 2150 lbs.
Compression ratio at 12:1, valve lift at .500", limited suspension.
</TD></TR></TABLE>

How would the power output of the B18 vs B16 motors compare at the above compression ratios? Would the extra compression and valve lift compensate for the 200cc loss in displacement (my partially-educated guess say it would)?

 

my Old GAC GSR was 2545 with me in it (150lbs). I figures there was about 50lbs more in it before going crazy with lexan and fiberglass. I figured 2450 was about as low as it was going to go.

KING RAT.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tyson &raquo;</TD></TR><TR><TD CLASS="quote">hows LTB doing with his del sol project</TD></TR></TABLE>

It's an EP project now and it's almost done.

 

I know Matt Watkins said his gsr was down to 2475 in dsp trim

And he still has a/c, sunroof, etc. That's an easy 100 lbs if he ever decides to get rid of that.