369 replies to this topic

[SA EH]

Hey all,

I've been progressively updating a 202 that i put in my EH some 5 years ago. 

What started out as a nice streety hyd cammed red soon became boring, so one solid cam, some headwork, better induction, nitrous & a lot more cash turned it into something cool. 

Now after continuous leaking from copper head gaskets, it was time again...

 

This is how it sits unassembled in my shed at the moment...

Ok, so without getting TOO carried away on details: 

0.020 over 202 (xql prefix - late torana virgin bore), ross forged pistons, bmw m30 conrods, bore reliefs, arp studs & stud girdle, modified oil galleries, external feed lines & remote filter.

It was never meant to get this far but those bmw rods took some modifying, they now weigh less than starfire rods. 

Much of this work was done at phase 2 of the build when i was already up to my neck in it, so... i continued on.

 

Got rid of the bloody o-rings in the block & im now gonna try one of those mls gaskets that have been popping up. Pistons now sit at zero deck height after block machining (were down .010), head gasket thickness is up .2mm to 1.2 and compression will see 11.53:1.

Cam choice this time was a case of, something bigger! I went for another crow stick after having no probs with the first solid. Part number 35731. Pretty good duration while keeping lift under .550 for us 9 port lovers. Previous cam was a 35803.

 

Onto the head, its a 161 high comp torana 9 port.

This round saw some stainless 1.72" valves made up to go alongside the 1.44" exhausts profiled to the same shape, viton stem seals, reshaped chambers, ls1 beehive springs (120lb), quality retainers/collets etc AND a shit load of porting! Enough for 198cfm @ .550 lift, 192cfm with the manifold on. Chamber volume sits at 44.2cc. Rockers are 1.5 YT stud mount nudged by crow moly pushrods.

The intake set up on this has always been my trusty triple 1 3/4" su's sitting on some modified armours manifolds, complete with a 0 - 200hp oznos kit.

Im sticking with the su's for now, they've been good to me. And i want to see how much i can get out of them, power wise. Plus they look killa oldschool!

The bosch hei distributor remains but is controlled by a crane hi6 box with timing retard control for the gas.

 

I've gotta say im a little anxious to see it all come together after ALOT of hard work & modifying but i thought i'd take a breath & bash a few keys before i did.

The previous combo (35803 cam, 10.1:1 comp & no wild headwork made 185hp at the wheels n/a, 270hp with 100 shot of gas) felt pretty lively so... thinking the new set up should break something in the driveline!

 

Anyways, just keen to throw it out there, see what you think.

 

 

 

 

[SA EH]

Yeah, the carbs, that's what I thought. I know they don't support big horsepower but just want to show what they can make before moving on to, more than likely, webers.
That will be it for this build as it's only in a street cruiser until such time as I put a mild 179 hp back into it.
Oldjohnno, your info from this forum has been invaluable to my build up, so thanks heaps.

[greens nice]

Sound's good to me, plenty of head flow for what your trying to do.
Don't sell the 1 3/4 carb's too short, at least not with a 9 port head.

I ran 13.1 @ 2700 lb's with my first engine that had 1 3/4's. on pump fuel with just under 10:1 comp.
This book written by David Vizard brush's on porting 1 3/4 SU carb's and gaining 60cfm via a few small Modification's.
http://www.amazon.co...2/dp/1884089143

 

I will take a set of good 2 inch SU Carb's over Weber's any day, and have tried both back to back,
the su's were actually faster in my situation

You didn't mention what extractor's/exhaust your running?

Edited by greens nice, 17 October 2013 - 09:28 PM.

[SA EH]

Correct - totally forgot.

Off the shelf hpc coated pacemakers, 1 1/2" prim 2" sec & 2 1/4" out, with a complete 2 1/4" system.

I managed to grab a hold of the Des Hammill SU high perf. manual & went through everything i could do to them while i had them apart.

So took off half the throttle spindle, removed all the daggy edges, sharp edges & casting marks, enlarged dashpot holes, new springs, high flow needle/seats... interested to see how they perform this time round.

I'm pretty keen on my drag racing so getting them properly tuned with the nitrous will be fairly critical.

[N/A-PWR]

If you need 1 5/8 primaries Jonesy, modify a 292 chevy L6 extractor ( headers ) as they have 1 5/8. Dave I

[warrenm]

Looks like a good combo.

I wouldn't be too hasty to fit Webers, 2" SU's are the go.

[warrenm]

You might find that the 2 1/4" exhaust could be a bit small if you're going to give the motor a "spray"

[Dave6179]

Just read this thread, just ordered 2 head porting books. Wanted the book above but they won't ship it to NZ. Bugger!

[SA EH]

Always knew the 2 1/4 would be too small, likewise the extractors, but if I knew where this was heading 4 years ago...
Modifying the chevy pipes sounds interesting, the competition pipes they make for lc/lj's look pretty wild but clearly won't fit eh's, will keep looking for a good solution.

[Dave6179]

Always knew the 2 1/4 would be too small, likewise the extractors, but if I knew where this was heading 4 years ago...
Modifying the chevy pipes sounds interesting, the competition pipes they make for lc/lj's look pretty wild but clearly won't fit eh's, will keep looking for a good solution.

I had to buy a set of pipes to replace my old cracked ones, could only afford some poxy Coby's. I couldn't get them to suit the HQ-Z so they were for an LJ. Had to finish the welding,  and they hung 2 inches too low under the car! I've lowered the HJ an inch and a bit so the LJ must have a deeper engine bay??? I cut the secondaries off below the cones and reshaped them to suit. 

Maybe.. just maybe, the LC/J pipes will fit yer EH. Ya never know!

[Dave6179]

http://www.shipito.com/

Interesting! The Vizard book on carbs 'n' manifolds would be nice to have, although I have already modified my SU's anyway. I read an old English book many moons ago that recommended shaping the piston for better airflow, and it bloody worked... and cost nothing! I've also given them a bit of a 'cleanup' inside the body too.

[SA EH]

The castle headers use 1 5/8 prim, 1 3/4 sec & 2 1/4 outlet. Was wondering about trying to adapt those torana competition headers that use a tri y design but join 1 & 6, 2 & 5, 3 & 4, then a 3 into 1 outlet. Hmmm, maybe I'll get the thing running before I start canning it too much.

[SA EH]

I'll chuck up some pics of the previous combo soon for y'all to have a gander, ill post while it's going together too.

[warrenm]

http://www.shipito.com/

Have you used this at all?

 

 

Maybe a set like these?

1 1/2" primaries, 2 1/4" secondaries.

 Headers (600 x 436).jpg   55.32K   5 downloads

[SA EH]

They look NAAASTY!
What do they suit?
Ps. I'm really liking the 2" su idea, it's growing on me. Will have to keep my ear to the ground.

[warrenm]

They look NAAASTY!
What do they suit?
Ps. I'm really liking the 2" su idea, it's growing on me. Will have to keep my ear to the ground.

They fit my LJ.

Try the 1 3/4" first,I think you'll be happy.

But they do look good hanging of the side of 6.

 DSC00015 PCV (600 x 450).jpg   79.38K   8 downloads

[warrenm]

Have you got any pics on how you ran the nitris into the manifold.

 

Also any pic's of the piston shaping 

 2013-10-19_09-13-42_860 (600 x 336).jpg   63.3K   7 downloads

 2013-10-19_09-14-01_309 (600 x 336).jpg   53.96K   3 downloads

 2013-10-19_09-14-12_962 (600 x 336).jpg   41.78K   4 downloads

 2013-10-19_07-43-29_23 (600 x 337).jpg   42.51K   3 downloads

Edited by warrenm, 20 October 2013 - 07:12 AM.

[SA EH]

Checking if my pics work...