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Thread Topic: Help!! Crunch Time, Need Ya'll's Advice About Head Rebuild Threaded

   
Date: 5-13-08 04:34
From: justinevert View user's profile
Subject: Help!! Crunch Time, Need Ya'll's Advice About Head Rebuild

OK, it seems that I finally got my wifes blessing to spend some $$ on a serious rebuilding on Lola's cylinder head. I would like everyone's opinion about Steve and his team at Top End Performance as well as what I have planned for the project:

WHAT I HAVE: Dual Wber 45’s with linkage, Schrick 292 Cam, MSD 6A Electric with BMW Red Coil, Mechanical Distributor with Petronix System, 8MM wires & Bosch Plugs and Valve Rocker Locks, SuperSprint Stainless Ceramic Coated Exhaust Header, Lightened Flywheel, Oversized 320 Radiator, and Oil Cooler. Engine has been previously rebuilt, standard stroke with 89.47 +.045 Oversized “Piano Top Pistons”


WHAT TO BE DONE:
All new Valve Guides (Late-model guides that accept Viton small diameter seals).
New Valve Seats
New Rocker Shafts
New Rocker Arms
Valve job to be 3 angle grind minimum.
All valves are then Hand-lapped and Back-cut for max flow
Complete set of (4) Stainless Steel 47mm Intake and (4) 39mm Exhaust -Valves(8) Titanium Retainers. Heavy-Duty Valve Locks, and Dual Valve Springs
Cylinder heads are Blanchard-ground/machined Top and Bottom with the upper timing cover in place.
Port and Polish of cylinder head and Weber intake runners
Complete Gasket set
ARP Bolting
Would like to have a bolt-on set up, Carbs set ready to drop on as well as electric fuel pump/filter/pres. regulator

I have had great advice from everyone here and I could really, really use any and all input about this set up as well as about the guys at Top End. If you know of anyone else who you can think can do this I would like to know and contact them.


I wait with great expectation and anticipation.

Kindest Regards,

Justin

'75 2002
Lola



Date: 5-13-08 04:43
From: wegweiser View user's profile
Subject: Re: Help!! Crunch Time, Need Ya'll's Advice About Head Rebuild

Hotter cam: 300 or 304 Schrick. New, not reground would be my advice. With all the other hot rod parts you have - don't expect me to believe you'll be keeping it below 4500 rpm that much. :-)

Read the following TWICE:

You WILL spin that motor WELL PAST 6400 rpm within the first 1000 miles. With an aluminum flywheel or even a lightened one? Count on it!

How light is the new FW?

What compression ratio piano tops? US tii? 9.0:1 or Euro tii? 9.5:1


or.....?

Expect to spend MANY hours dialing in the carbs. Suggestions from message boards will get you close - but it will be a lot of trial and error / spark plug inspection required.

Like I said - 292 cams just don't do it for me....I figure, if I'm "commiting" to DCOEs....I want 'em to BREATH!!!!! ....So do you.

HTH!

Paul



Date: 5-13-08 05:42
From: TobyB in Seattle View user's profile
Subject: Re: Help!! Crunch Time, Need Ya'll's Advice About Head Rebui

yeah, not so much for me either with that cam in that setup...
especially if you're bothering to enlarge the valves, etc.

Choke size for the carbs?

Valve springs? if you're going over 6700...

Don't get too fancy in talking to your machine shop-
blanchard grinding aluminum isn't the normal way to make it straight.

t
_________________
I have a car disease. There is no cure.
I'm not even managing the symptoms very well...



Date: 5-13-08 06:18
From: wegweiser View user's profile
Subject: Re: Help!! Crunch Time, Need Ya'll's Advice About Head Rebui

In case you're wondering....I, too was prepared to spend all kinds of silly money on larger valves, wacky machine shop spiffiness, and other tweaks. Eric Kerman's advice: "Don't waste your money, unless it's a dedicated 200+hp track car that runs on race fuel exclusively. Put larger chokes in the DCOEs, set the timing to XXX and drive it."

He was right.

If you aren't aware of Mr. Kerman's credentials - he's been building M10 motors since the 70s, and works full time at a company that builds / rebuilds vintage 40s-80s Formula motors professionally ...Ferrari, Lotus, Cosworth, etc. He built mine w. S14 M3 crank and rods, specially coated bearings (ala NASCAR) and modified the crank nose to fit a stock 2002 pulley as I requested. if you're gonna spend money - get the big dollar rocker arms.That's the part of the motor I worry about at 7000+ rpm..oh!....and the clutch splintering apart!!!!!

My only regret, is that I didn't stuff this motor under the hood of a trashy faded city RAT 2002.....it'd be a LOT more fun!

Paul Wegweiser



Date: 5-14-08 08:54
From: TobyB in Seattle View user's profile
Subject: Re: Help!! Crunch Time, Need Ya'll's Advice About Head Rebui

Actually, if you're not spinning 7500+, get the right valve springs
and you can run standard rockers.

And if you do decide to spin that high, it's probably time for custom rods
with bigger bolts, too...

The M10 head's pretty darned good- more cam and bigger induction
will really let it sing, even in stock configuration.

fwiw.

t
_________________
I have a car disease. There is no cure.
I'm not even managing the symptoms very well...



Date: 5-14-08 11:49
From: justinevert View user's profile
Subject: Re: Help!! Crunch Time, Need Ya'll's Advice About Head Rebui

So far so good on the advice, some other things I forgot to include:

I will be running a 5 speed with a 3.64, I like to make it a "sleeper" very subtle, like a stiletto

Granted some of the items mentioned sound a bit overkill but I like to overengineer things for some peace of mind.

Has anyone had any good experiences with Top End? Who else would you recommend?

Thanks, please keep them coming.

Justin



Date: 5-14-08 03:13
From: wegweiser View user's profile
Subject: Re: Help!! Crunch Time, Need Ya'll's Advice About Head Rebui

Over the last 10+ years, I've found the fellas at Ireland Engineering to be great. Jeff and Jeremy have always been a real help with techie / speed questions. Their products are well engineered, purpose built, and generally manufactured with beautiful craftsmanship.

Paul Wegweiser



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