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4.5L into a 4.2L GU petrol ?

Tech Talk for Nissan owners.

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4.5L into a 4.2L GU petrol ?

Post by MUNGA GQ »

any help,
I have a 4.2L efi motor in my 94 gq.
done 500,000 and still going.
but i have a 4.5L motor out of a 99 gu with stuff all km's on it.
thinking of putting it, but i do not have the wiring loom for it.
so a throught was put the 4.2L injetion manifold on the 4.5L
ploblem solved or not?
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RN
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Post by RN »

I was looking at the EFI manifold from the GQ and GU for a project .

I have a GQ Mav carby, The wreckingyard showed me both manifolds and it was obvious that the GU manifold would not fit on the GQ . Think you should evaluate swapping the GU motor over whole.
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Post by drakan69 »

dont forget to keep your TB42 rods for your TB45, so you can boost it!
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Post by 1TUFFGQ »

What's wrong with the conrods in TB4.5
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Post by BDH GU »

Nothing but you need to decomp the engine to put serious oost on and the TB42 rods allow for this
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Post by badger »

tb45 and tb42 rods have the same stroke.
tb45 are just alot weaker. that said there are a few guys on here putting good power thru dead stock tb45's with no legs out of bed as yet
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