H22a7 bottom end h22a top end

FrontBackSide2Side · Post by **FrontBackSide2Side** » Sun Jun 02, 2013 7:13 pm

For my turbo build I'm planning on using a h22a7 block with a h22a head, is this possible?

Also planning on using obd1 management, will this pose any problems with the a7 bottom end?

Post by **4thgenphil** » Sun Jun 02, 2013 7:27 pm

why do you want to use the h22a7?

its higher compression aswell as being open deck. personally i would use a uk 4th gen lump as its closed deck and has 10-1 comp.

the only really gains of a a7 aside from the higher comp ratio is that it has a 55mm crank as opposed to a 50, its still debated as to whether its actually a gain though.

Post by **4thgenphil** » Sun Jun 02, 2013 7:30 pm

or go slightly left field and look for an f23 block, actually 2, i want one aswell

FrontBackSide2Side · Post by **FrontBackSide2Side** » Sun Jun 02, 2013 7:49 pm

Compression ratio isn't an issue as I've got some wiseco pistons

I went for the a7 as like you said its got the beefier crank and I wanted the open deck to make the most of the darton wet sleeves cooling capabilities

Post by **4thgenphil** » Sun Jun 02, 2013 8:11 pm

toyracer69 · Post by **toyracer69** » Mon Jun 03, 2013 11:57 am

What sort of pressures are you planning on running as the A7 will only take low....

And its a waste to boost that version of the block.

Post by **Merlin** » Mon Jun 03, 2013 12:01 pm

You'll be able to pick up an H22a2 for next to no money

FrontBackSide2Side · Post by **FrontBackSide2Side** » Mon Jun 03, 2013 12:47 pm

Merlin wrote:You'll be able to pick up an H22a2 for next to no money

What are the specs of an h22a2, crank wise etc?

Post by **Merlin** » Mon Jun 03, 2013 12:50 pm

10:1 CR, standard cams (same as JDM H22a etc...), 60mm TB, 50mm crank.

Like Phil says it is the UK 4G engine and pretty much the least desirable H22 for most people. Hence why it will be cheap.

FrontBackSide2Side · Post by **FrontBackSide2Side** » Mon Jun 03, 2013 1:49 pm

What sort of power is the standard crank good for?

Lude Generation

H22a7 bottom end h22a top end

H22a7 bottom end h22a top end

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Re: H22a7 bottom end h22a top end