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What is a better start?

 
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Old 05-15-2011, 03:38 PM
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What is a better start?

Hey again, i know i have a thread about an engine swap but this is a different question i suppose.

Would i be better off leaving my f20a engine in my 4th gen and start tuning it out, or, would it be a better to start to get a h22a in there first and then tune that? basically i am trying to way up whether a tuned f20a will pull as near as the h22a and what is a better cost option.

Thanks guys
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Old 05-15-2011, 04:19 PM
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Re: What is a better start?

I'd probably ditch the F20 and either go with the H22 or the K20. Depends on how much money you've got.
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Old 05-15-2011, 04:27 PM
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Re: What is a better start?

Thanks for the reply,

K20? Hmm didnt consider this one, dont really know an awful lot about the engine. Is it a straight forward swap of ecu, block and box and whats the comparison of power between the 3?
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Old 05-15-2011, 04:39 PM
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Re: What is a better start?

Just had a quick search, the k20 looks a bit out of my price range unfortunatly. Will the h22 be more flexibles with parts and power than the f20?
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Old 05-15-2011, 05:31 PM
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Re: What is a better start?

What's the price difference between the K20 (plus tranny) and the H22 set up? The K20 will save you about 100lbs, much better mileage, less oil etc. so it might save you money in the long run.

Someone correct me if I'm wrong but the amount of parts available for the H22 is a lot more than the F20.
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Old 05-15-2011, 06:00 PM
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Re: What is a better start?

I may be wrong, i only had a quick look over at some engines on ebay. What power differences and tunability is there between the k20 and the h22? Also, what do you recon the max i could pull out of the f20 with basic mods i.e induction, intake manifold, throttle body, exhaust manifold, minimul restriction exhaust, poss cams etc?
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Old 05-15-2011, 07:23 PM
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Re: What is a better start?

Here's a quick look comparing the H22 to the K20/24. For those thinking about a K swap

Despite being smaller, the K20 has more torque across almost the entire power band. Slightly less HP in the lower rpm's but more HP higher up.
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Old 05-15-2011, 07:46 PM
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Re: What is a better start?

Oh right thanks man, wouldn't mind splashing out for the k20a4 if i could find one. Are they as straight forward to fit as the h22?
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Old 05-15-2011, 08:43 PM
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Re: What is a better start?

Hasport makes mounting brackets and axles, not sure about a wiring harness.
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Old 05-15-2011, 08:43 PM
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Re: What is a better start?

If I was you I would go for a H22 pretty much a straight forward swap and less on your pockets...
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Old 05-15-2011, 11:49 PM
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Re: What is a better start?

Yeah from what i have seen the h22 swap is the popular one to do. But still my question is whether it is more cost effective to try and tune the f20 up to a similar standard or will i get a lot further getting a h22 to begin with?

Thanks so far
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Old 05-16-2011, 08:04 AM
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Re: What is a better start?

No question about it... Just get an H22.

It doesn't make sense to waste money on a 133hp F20A (the weakest motor available in a Prelude) when you can just swap in an H22 with 200hp straight from the factory.

Right out of the box an H22 will reliably give you much more power than you'll ever be able to get out of a NA F20A4 for the same money spent.

And with the H22 you'll also have room to make even more power if you choose to tune it later.

Last edited by Grims; 05-16-2011 at 12:57 PM.
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Old 05-16-2011, 01:07 PM
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Re: What is a better start?

Thanks mate, unfortunatly my insurance wont cover the swap but will cover any amount of modification's as long as its the f20. Might look down the route of a turbo conversion.. Any tips on that?
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Old 05-16-2011, 05:38 PM
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Re: What is a better start?

I see. Well, you should be able to make pretty good power if you turbo it properly.

The best advice I can give you is do some more research on turbo F-series builds. There are many guys out there with turbocharged F20 and F22 motors making good power.

Decide how much power you want so that you know what you'll need to do in order to reach it safely...

And in the meantime don't waste money on small insignificant NA mods that won't get you closer to your turbo goals, but be sure to get some good high performance brake pads to go along with your turbo build.
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Old 05-16-2011, 06:30 PM
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Re: What is a better start?

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Originally Posted by Grims View Post
I see. Well, you should be able to make pretty good power if you turbo it properly.

The best advice I can give you is do some more research on turbo F-series builds. There are many guys out there with turbocharged F20 and F22 motors making good power.

Decide how much power you want so that you know what you'll need to do in order to reach it safely...

And in the meantime don't waste money on small insignificant NA mods that won't get you closer to your turbo goals, but be sure to get some good high performance brake pads to go along with your turbo build.



Thanks alot mate, obvs did a good thing joining this forum, look forward to recieiving more help as i get deeper in
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Old 05-16-2011, 06:41 PM
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Re: What is a better start?

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Originally Posted by Underrump View Post
Thanks alot mate, obvs did a good thing joining this forum, look forward to recieiving more help as i get deeper in
Glad to help!
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Old 05-16-2011, 07:03 PM
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Re: What is a better start?

Have you or anyone else got any obvious reccomendations as to best turbo to use and other parts etc? Just so i have somewhere to start. I gather i will need a new ecu aswell, what is the best for money one i could pick up?

thanks again
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Old 05-16-2011, 08:04 PM
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Re: What is a better start?

Yup, i got a lot of research to do before starting.
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Old 05-17-2011, 06:52 AM
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Re: What is a better start?

If you want to do it properly and have it last, I'd highly suggest getting forged rods and forged low compression pistons.
You can also search Accord forums if you have trouble sourcing parts, since some Accord models also came with the F20A4 motor.

Here's a short vid of an Accord with a built F20a4 turbo with forged internals and a T3/T4 turbo...



And an F20A4 turbo Prelude starting out in 2nd gear...

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Old 05-17-2011, 07:32 AM
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Re: What is a better start?

Thanks mate, from what i have found do far, it seems the manifold id the hardest one to find. Could you recommend a manifold or will need to be custom built from scratch?
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Old 05-17-2011, 07:48 AM
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Re: What is a better start?

I think a custom manifold will be your best bet.
It won't be too difficult to fabricate for someone with experience, and a well designed custom manifold will be much more efficient than those mass produced log manifolds that are commonly found with basic turbo kits.
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Old 05-17-2011, 08:20 AM
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Re: What is a better start?

Also remember to upgrade your clutch, since the stock clutch won't last long with the extra torque you'll be making with a turbo.
Solid polyurethane engine mounts will also be a good idea, since stock engine mounts tend to struggle under boost applications.
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Old 05-17-2011, 08:39 AM
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Re: What is a better start?

So, you wanna go turbo, huh?
you can start there with turbo

if you want a modest 250whp, i'd recommend something in the t3 family, something like i had a t3super60, .63a/r

for 3-400whp, i'd go t3/t4 hybrid, or maybe gt30r if you'd like the higher end of the range.

if you want higher than that... gt35r or busttttt
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Old 05-17-2011, 01:32 PM
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Re: What is a better start?

Thanks guys thats awsome help
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