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gu engine conversion.

14096 Views 35 Replies 12 Participants Last post by  ZAPPAGU
gu 5L engine conversion.

hey guys.. have been doing some searches but have come up kinda at the same result which hasnt answered my question.

i am considering a engine conversion for my GU but was going to put a holden 5L engine instead of the LS1/2. and before you ask yes i have looked into both and i have made my decision. the cost of the LS1/2 outweighs the benifits over the 5L as far as im concerned.

i have heard a few people say that you have to use an engine as old if not newer then the car your putting it into.. i havent heard this before and i have seen a GU with a 5L in it but mostly its GQs.

has anyone put a 5L into a GU and if so can you give me an idea of what the end results were and any info that will make my decision easier.

if it helps the GU has a 2.8L and i was going to replace the manual with an auto with the reduction gears in the transfer case.

i have a budget of around $7K and will be able to do pretty much everything myself. (might need a hand with the electrical side.... im a black hander).

also how roughly am i looking at for an engineers cert. i have never had to deal with one before...


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well the 5L isnt exactly a slug. yeah it may not be a supercar engine but show me a 4x4 thats running 10sec 1/4s and then going out bush to throw mud about. i dont need a 300hp engine. i just want something that is going to give me good solid power. i know the 5L is a strong engine.

i have a $7k budget. not $10k+ yes i understand the extra power and better fuel efficiency of the LS series engines. i have had a 5L and had 2 LS1s in the past before i got into 4x4s.
so i know the LS1 is a better engine. but i simply cant afford it.

i know that you can easily get double the power of a 5L compared to a rd28 at the wheels.

alot of people are putting them into GQs with very good results.. so why wouldnt i get them in the GU???

hell if i had the money i would love a LS1 they are a great motor, but i dont... i have to live to my budget and what is ok for me... at the end of the day a V8 of any kind is going to chew fuel.

if someone has a better option in my price range im all ears...
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thanks guys. will look in to it but like i said. i doubt i will be able to find the money for a LS engine change.
thanks guys.... lots of good ideas.... too many in fact now im lost in ideas haha..

will keep scouring the net i guess. if i can find a good motor gearbox combo in the LS1 i will be looking at it...

thanks again.. will keep you posted on my final decision

again guys. i can see both sides to the argument. i like both motors as an option. and eventually i will have to choose something. if i can get some extra money from somewhere yes i will definitely look into the LS1 because i have had 2 before and i know them well enough. however i still think while yes it is an out dated by todays standard and not as powerfull or efficient. the 5l may still be a viable option.

i didnt want to cause a debate over which engine everyone thinks is better and why. i know both engines. and their flaws. it was more a question of affordability.

either way, i will make sure that my decision is well though out and planned. i am pretty good on the tools (should be after 8 years of working with them) so hopefully if i can do the majority myself i will be able to keep the costs as low as possible. and i will be posting a start to finish on the project.. see alot of people starting a thread and people are still waiting for the final results.... i will just do it all once i am finished.... save the suspense.

cheers again

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