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Ateco 500efi upgrade

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Old 04-08-2011, 02:26 AM
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Default Ateco 500efi upgrade

Has anyone tried this 600hp upgrade kit that I've seen in classifieds?

http://www.offshoreonly.com/classifi...o38686-en.html
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Old 04-08-2011, 06:23 AM
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Originally Posted by Irishtornado View Post
Has anyone tried this 600hp upgrade kit that I've seen in classifieds?

http://www.offshoreonly.com/classifi...o38686-en.html
Seems like a lot of stuff for the price if it works to bring a true 100hp.

Last edited by ElimiNordic; 04-08-2011 at 06:25 AM.
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Old 04-08-2011, 09:25 AM
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That's a very nice price for all that is included. I have not heard of anyone using the setup, but that would really wake up a 500. Wish they had that posting last year when I rebuilt mine.
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Old 04-08-2011, 11:32 AM
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Without intake work and throttle body replacement, I seriously doubt you are going to see 600 hp. The intake is the limiting factor. The throttle body is not far behind.
Also, certainly not a knock against Ateco, but you can't really succesfully do a cal. for an engine with that many mods and get it 100% without tuning it. You can get it close, but every engine is different, therefore requiring a slightly different tune. It may run fine, but it will not be the best it can be. For this reason, I don't offer any "packages" or do I do any tuning through the mail.
Again, not a knock against Ateco. It's just something that I won't do. I have rarely seen it work out that good. However, it is a pretty good price on the parts.
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Old 04-08-2011, 12:04 PM
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Without intake work and throttle body replacement, I seriously doubt you are going to see 600 hp. The intake is the limiting factor. The throttle body is not far behind.
I was thinking the same.
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Old 04-08-2011, 12:13 PM
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Irishtornado,

The 600 kit in classifieds is for a carb engine. The jetting of the carb will need to be motified, but we can help you with this. We have dyno sheets to substantiate.

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Old 04-08-2011, 12:18 PM
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Irishtornado,

The 600 kit in classifieds is for a carb engine. The jetting of the carb will need to be motified, but we can help you with this. We have dyno sheets to substantiate.

Matt
Irish has 500EFI's.
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Old 04-08-2011, 12:37 PM
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Default Up to 125HP increase for your Merc 500EFI

We also offer a 500EFI kit. Its in the classifieds, "Up to 125HP for your Merc 500EFI"
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Old 04-08-2011, 02:15 PM
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Originally Posted by Ateco View Post
We also offer a 500EFI kit. Its in the classifieds, "Up to 125HP for your Merc 500EFI"
Guarantee'd 125HP? I've seen both kit's and done lots of research. You have my attention.
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Old 04-08-2011, 03:12 PM
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We're doing something similar ( pro 1 heads, bigger cam,
asm throttle body, ecm mods)

Just got the ecm's back from getting re-tweaked, we try
them on the dyno again tomorrow...we'll see what happens.

Judging by what the air quality is suppose to be like tomorrow,
if we get 575 out of them, we'll probably do cart wheels
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