I am building a delSol for Solo2 EP class.

As far as the engine goes, I have to use the B16A3 block, with any PR3 head.

So far, I have a Darton-sleeved block with 82mm bore (the max I can use under the rules). Also, the car has a 255lph Walbro pump, all AN fuel lines, FPR, AEM fuel rail, and Axle Shop Stage 3 axles. The trans has a Quaife.

The car will see RPMs in the 3,000-8,500 range, mostly, as I will only be using 13" wheels, and I'm using stock B16 gear ratios in the trans.

Any tidbits of advice for this build?

Here is a list of things I can and can not do for my class:

CANs
-Use any piston
-Use any ferrous metal rod
-Lighten, balance, and knife-edge the crank
-Use an electric water pump
-Mill the head/block for C/R increase
-Add a main girdle
-Use any cams (including VTEC killer)
-PNP the cylinder head
-Use any intake manifold
-Use any exhaust manifold
-Use any exhaust (cat not required), must meet 78dB requirement

CAN'Ts
-Weld the combustion chambers
-Change crankshaft stroke or throw angle
-Use a power adder (duh, I'm in the all motor section, lol)
-Bore the cylinders anymore than they already are

Thanks for any help in advance


Modified by delNightmare at 12:36 PM 10/4/2005

 

you can go a million ways on this...lots of options available to ya it seems...

 

mill the head .030, p30 pistons with opened up valve reliefs, performance 3 angle valvejob and omni valves, pro1 cams, rocket gen2 springs and retainers, good set of cam gears, and get it tuned

 

Keep the replies coming.

PURPLE, thanks for the info.

Is there a 12:1 or 12.5:1 piston that anybody knows of in 82mm bore?

 

CP, Endyn Rollerwaves, IB Spec, etc. etc. all available in 12.5ish. Personally, I think you could go a little higher on the compression if you threw a big cam at it. We were not knock limited in a 85mm 12.5:1 PR3 head motor with Pro1s in a lot of the map. With Pro2s/BC5s/etc that have more overlap you might be able to get away with running even higher piston compression on 93 octane.

Skunk2 Pro1s, M22X, BC4 are my cam recomendations. Get cam gears if you're allowed.

Send head to RLZ.

Endyn/AIR Intake manifold if you can afford it / lay your dirty paws on one. Full-Race good 2nd choice for roadracer. AEBS budget winner.

Pimp *** header - hytech, rmf, SMSP, dtr

Be mindful of your noise requirements on the exhaust - Hytech twinloop or similar would probably serve you well.

 

As this is a SOLO engine I would start with the bottom and get a Mugen or Canton oil pan, so there is no oil starvation. Next light rotating wieght, Carrillo A beam rods, and a lite flywheel clutch assembly. For 82mm pistons you want full skirt as they last longer in your enviroment, Accralite are the lighest, and have 12+ compression. You want a good head, but not big flow numbers as it will kill the bottem end numbers on the B-16 and you will not get off the corners. I would prob. go with a cleaned up or Extrude honed B-16 or "R" intake for the same reasons 62mm Max. throttle body. The new Pro series cams from skunk as they have the best numbers when below VTEC, prob 1's. Long primary 4-2-1 headers, same reason. The shortest gears and ring and pinion you can get in the trans. Remember this is not a drag car or dyno queen, average BHP and TQ from 5000-8500 is what you want and low inertia from the drive train.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DonF &raquo;</TD></TR><TR><TD CLASS="quote">As this is a SOLO engine I would start with the bottom and get a Mugen or Canton oil pan, so there is no oil starvation. Next light rotating wieght, Carrillo A beam rods, and a lite flywheel clutch assembly. For 82mm pistons you want full skirt as they last longer in your enviroment, Accralite are the lighest, and have 12+ compression. You want a good head, but not big flow numbers as it will kill the bottem end numbers on the B-16 and you will not get off the corners. I would prob. go with a cleaned up or Extrude honed B-16 or "R" intake for the same reasons 62mm Max. throttle body. The new Pro series cams from skunk as they have the best numbers when below VTEC, prob 1's. Long primary 4-2-1 headers, same reason. The shortest gears and ring and pinion you can get in the trans. Remember this is not a drag car or dyno queen, average BHP and TQ from 5000-8500 is what you want and low inertia from the drive train. </TD></TR></TABLE>

Nice info don, i didnt see that the block was already sleeved to 82mm, how do you like the weisco pistons?

 

Wiseco has always made a good product, even after they were bought by JE. There are diff Wiseco's though. I like full skirt for road racing. Strutted for drag racing.

 

could do a piston stroker kit....

also, is race gas out of the question?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WrongWD &raquo;</TD></TR><TR><TD CLASS="quote">could do a piston stroker kit....</TD></TR></TABLE>

What??????

 

redesigned piston, read tech43 kit...though there are alternatives out there.

 

Yes, I can use commercially available race fuel.

Cam gears are allowed.

Also, sounds like I can move more towards 13:1 C.R. I like the sound of that.

DonF, I definitely plan on the Mugen pan. In fact, I spun a rod bearing in the car earlier in the season during a long sweeper (yes, the car had enough oil in it). I'll take a look at the Carrillo rods. I know the A-beams are lighter than H-beams, but will they hold up to 13:1 compression?

Also, I have my eyes set on the new SKunk2 Pro cams, as I've heard they offer great on and off-VTEC profiles.

Thanks for all the input.

 

Sk2 Pro1, Pro2, Pro3
M22X
Buddy Club 4,5

All of those cams have meaty non-vtec lobes that will give you a much larger powerband than the older generation of cams like Sk2 St2/3, etc.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blundar &raquo;</TD></TR><TR><TD CLASS="quote">Sk2 Pro1, Pro2, Pro3
M22X
Buddy Club 4,5

All of those cams have meaty non-vtec lobes that will give you a much larger powerband than the older generation of cams like Sk2 St2/3, etc.</TD></TR></TABLE>

he said he wants powerband no more than 8500 ... all those cams will go WAY past that band, he needs to undercam the motor, i.e. something as simple as a CTR cam, Toda spec A or Skunk stg 1 will give him gobs of TQ in the RPM band range he's shooting for.

he should also use the 2nd gen b16a manifold and port t/b no more than 62mm.

Also be sure ot put a good balancer on that crank !!!

Greg

 

What's the necessity of a good crank balancer in this application? Most autocrossers use un-dampened underdrive pulleys.

I will only be using 13" wheels, with the stock (for now) 94 delSol gear ratios (which are pretty steep). So 9-9,250K rpm may be more realistic. Unless I get myself in a bad jam, I should be utilizing a powerband of approximately 3,500-9,500 consistently, with pulls from 5-8K rpm occuring with frequency.

I had considered the VTEC killer cams, but I don't know if that would benefit me or not.

 

Agood balancer will always help engine life, but a B-16 does not need one as bad as the longer strokes because of smaller harmonic frequencies and less twisting moments in the crank itself.
The Carillo A's are not as strong as the Carrillo H beams, but unless you are going to boost it 25 lbs. and turn above 10500. You will not exceed their yield point.
The new Pro 1's and 2's make way more bottom (before VTEC) than the old Stg. 1's,2's,3's. I think the 2's are a little big for a B-16 in the range you want to run in. The Pro1's , when set to OE numbers peak at 8200-8400 RPM's and will run to 9000, without that much drop off.

 

are itbs allowed?

 

Yes, ITB's are allowed. I'm not too sure they're in the budget for this year, but a switch to ITB's for the 2007 season is planned.

 

Thats a tight rule set?

I was expecting showroom stock type rules.

Essentially you can do everything but increase displacement. Get as wild a cam as possible, run the most compression as possible, and port the head/pick IM/TB/Header to match your powerband.

 

Crower is running a special on their cams right now. Does a Crower Stage 2 cam sound like it would work for what I'm going to do with the motor? The specs are

Advertised duration:
Int- 311 mid
Exh-308 mid

Duration at .050" lift
Int- 255 mid
Exh-248 mid

I will probably use a 12.5:1 piston, and I'm looking at a SKunk2 Pro I/M for this season, until I can get a nice ITB set-up.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CHEETAH &raquo;</TD></TR><TR><TD CLASS="quote">he said he wants powerband no more than 8500 ... all those cams will go WAY past that band, he needs to undercam the motor, i.e. something as simple as a CTR cam, Toda spec A or Skunk stg 1 will give him gobs of TQ in the RPM band range he's shooting for.

he should also use the 2nd gen b16a manifold and port t/b no more than 62mm.

Also be sure ot put a good balancer on that crank !!!

Greg</TD></TR></TABLE>

13:1 cp on such a basic/mild cam? hows does this work? are there compensations for this such as other protocols the motor needs to run for this to work? I would think that kind of compression would be out of this world for those kind of cams. any words on this cheetah/donf? very interested..