greenhj

Exactly as the heading says, what block, crank, rods and head to suit a bit of blow thru action? nothing ridiculous, maybe 350/400 ponies. Who can build it?

allports

Green I built a 202 for my good friend's dragster that went 7.708 @168.92mph in a front engine rail. We used a Red crank nitrided and alloy rods with Venolia forgings. You can get H beam steel rods and the same pistons from him. I'll Pm you if your interested.

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greenhj

Id love to know more, I may end up going this way for the new project car. I want it streetable and reasonably polite to drive. I know nothing about blown engines so I wouldnt mind some advice. What block for starters, Are cubes important when running some psi? There would have to be a plethora of boost options for smaller engines, What sort of revs would I need to have a reliable blown 6 making 350 ponies? Would a red crank, blue rods and decent pistons live? I have a sad 179 in the shed? usuable or go for something else. Factory head or alloy? Ignoring the cost of the boltons, what would an appropriate engine cost in parts? How long would a boosted 6 last? How much boost is required? What sort of power adder? snail, hairdryer or jimmy.

mackeb

I've heard the low comp 149 was the way to go for turbo apps, but I do know someone who had a 179 single turbo in his lh, reckoned it went fantastically well. Never got it dyno'd but he reckoned it was about 350 hp or so. SOunds feasible enough.

Smitty2

hmmm..bit of a tuffy

best block for this is the 149 or 173 red..coz its got more meat
best crank is the 'steel' 186 (or 179)
best head is the 12 port blue
and rods....?
really only XU1 or Starfire

bit of a dogs breakfast that lot

or a 20 or 30thou over 186
with a YT 'post' head plus the steel
crank and starfire rods would be the go

and pistons..?? gotta be forgies
brand..?? whoever

hth

Smitty

allports

202 red is fine just dont go above 40 thou over. Blown engines drive soooooo easyyyy. The 179 may be ok if u get it sonic tested and etched once its given the ok.

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allports

The starfire rods will only take a small boost engine. Most guys use for the street BMW (bm trouble u) ROds and hack 80thou off the top of the duralites. I personally dont like them too much as they are a little soft.

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PRO-GMH

I know you said 'holden' engine... but have a look at the RB30ET. With a stock bottom end and using only bolt ons you can get up over 500hp. So considering you're wanting 350-400 that is a walk in the park and gives you the option to turn it up down the track.

Even with just a high flow turbo, bigger injectors, a decent intercooler and some boost you have a pretty potent car that will knock off most other things out there and itll be EFI and pur like a kitten.

Numerous people have run 10 second passes with these motors in full street trim and the motors have lasted years and years. I have a friend who has one with 155,000kms on a stock bottom end, good tune and 35/40 turbo and external gate and makes 320 rear wheel kilowatts. It has a decent driveline set up and is expected to trap 125-128mph shortly at calder. Thats a mid to high 10 second pass. Just got to make sure your bottom end is in good order - its a good option to rebuild it if you're aiming for big power obviously.

Get a standard rebuild, if you're wanting more do a cam and some forged pistons and you'll never look back.

You might be able to get similar power out of a holden 6 but the things are 30-40 years old to start with, the rods arent the strongest even naturally aspirated and you wont have years of development to guarantee your expectations.

If it were me, I would do this option without a second thought.

Davo 351

the good old vl commo with rb30. made by holden, powered by a nissan designed by ford.
nothing stops the rb30, 5 spd borgy, salisbury combo.
very good idea, although not a holden.
i remember seeing on an old (80's) street machine video, a wb ute with a 202 blue motor, port and polished head, stage 2 cam, roller rockers, garret turbo on 16psi, some sort of gas carby, extractors and 3 inch exhaust that made 281rwhp on the dyno. only be $4g worth of parts there if you buy turbo brand new, maybe the way to go.

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allports

Screw the nissan engine we need a dirty old taxi motor 202.
BTW our 202 motor had only 17lbs of boost used 10000rpm and made over 600hp

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If you plant a cucumber, you get a cucumber!
Two things are infinate,the universe & human stupidity, and Im not sure about the universe.
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moot

or you can do that easily on an internally stock 2jz (or 1j for that matter )

as much as i (sometimes) like holden engines,there is so much more 'bang for ya buck' out there its not funny.

allports

True moot but there is something magnetic about those dirty ole taxi motors. On the other hand those 2Jz things of Wedlock and Signorelli are awsome to watch but they just dont have the sound.

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If you plant a cucumber, you get a cucumber!
Two things are infinate,the universe & human stupidity, and Im not sure about the universe.
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GASSD6

Hi greenhj there are alot of good old sixs out there at the moment, i think reliability wise you should go either vk efi set up intercooled with aftermarket wolf3d or go for the straight gas research with a cooler the blow though carby type are a pain to tune all the time and you can run more boost with a intercooler, other option build a tuff asp engine with triples and a direct port nitrous set up for that extra hit of HP whenever you want it. all of the blue 202 stuff is good just need the right combo to suit what you want. a guy i know runs a 202 blue motor with a big 35/40 turbo on 20psi in a fc and it made over 500hp and just ran a 10.3 at xmas time

greenhj

Hey mate, was that at heathcote boxing day, If im right that car has been around for years, didnt it used to have a real nasty nitrous motor in it?

Anyway, seeing that fc absolutely embarass a lot of v8's on the start line is what got me ticking on a turbo six. Obviously I want a milder setup but I cant see why I cant have 350 reliable hp. A cranky aspirated six will make 300 but the keyword is cranky, I want a cruiser with punch.

The jap sixes are good engines, theres no doubt about that but its just not my idea of excitement. If it was a ridiculous thing to blow the holden 6 (and clearly its not, judging by the opinions expressed) then fair enough but I am starting to really lean towards the old straight six as a power plant for the new project.

Keep it coming guys...

greenhj

Not to stray off topic but to head in the right direction, how many cubes, rpm and pounds boost to achieve 350hp? I would like a broad torque curve as it will be a driver and needs to be reliable firstly and not too cranky (if I want unreliability and crankiness I can drive the monaro)

The engine in the car is a tired old 173...