85 mercruiser 260hp

[badbowtie]

I have been reading for a while and searching all over. I was debating on selling the boat and going newer and bigger this year but not sure I want the payment I love saying it is paid for. I have a edelbrock 1410 carb that is only a couple years old and rebuilt it last year and still the same thing, it won't idle very good and just doesn't run great, has a couple dead spots. I was thinking about going with the holley setup
http://www.holley.com/700-21.asp
But would like some feedback I am running a holley commander setup on my pro street s-10 and am happy with it.

 

[dan t.]

Re: 85 mercruiser 260hp

Go for a Q-jet, better milage and throttle response.

 

[Joshua Nichols]

Re: 85 mercruiser 260hp

Go for a Q-jet, better milage and throttle response.

He is looking to install fuel injection... not a quada bog

If ya go for it. Would love to hear how the performance is... I might be able to afford a fuel injection boat in the next ten years.. That kit looked like a good way to get outta the carb world

 

[Bondo]

Re: 85 mercruiser 260hp

I have a edelbrock 1410 carb that is only a couple years old and rebuilt it last year

Ayuh,... I know the 1409 is the 650cfm carb(that you should have),...
What's the 1410,..??

If ya sort out the Carb, it should run Just Fine....

Efi is an Expensive up-grade...

 

[Don S]

Re: 85 mercruiser 260hp

This was just talked about yesterday in this thread.
http://forums.iboats.com/showthread.php?t=460163

 

[badbowtie]

Re: 85 mercruiser 260hp

I have never been a fan of the q-jet and, I really just hate carbs. I have been really reading around and think that is going to be the best setup to run I can't find anything else that is cheaper.

The 1409 is 600cfm
The 1410 is 750cfm this is the one I bought a couple years ago.

I did see that with wrong information the kit is 1083.00 not 2500.00 If you use the kit that is 2500.00 you have to tune with laptop like I have to in my s-10 but the one I posted it has it own dials to adjust it. I think 1000 dollars is cheap compared to upgrading boat mine is paid off so that would be like 3-5 boat payments. I would like to here feedback about better performance over carb all around or no it made no difference.

 

[88 206]

Re: 85 mercruiser 260hp

I am converting to Edelbrock carb on my boat and was told 750cfm is too large for stock 350. I am going with 600cfm (1409) carb. Possibly your problem?

 

[badbowtie]

Re: 85 mercruiser 260hp

Yea I understand carbs were used for years and still are and on gm the guys that still use them dont know how to do fuel injection, much more reliable and efficient. There is a reason why myself and millions of others are installing new ls style engines and installing fuel injection setups on muscle cars and street rods. I have been doing cars for years and a fuel injected motor will out perform a carb motor 98% of the time. I am not buying another new carb if I stay carb I would have to see if I can just jet the 750 down.

 

[Joshua Nichols]

Re: 85 mercruiser 260hp

Fuel injection is the ticket... I think the price is fair for what ya get in the kit... I rather have fuel injection over a carb anyday...

 

[Don S]

Re: 85 mercruiser 260hp

installing new ls style engines and installing fuel injection setups on muscle cars and street rods. I have been doing cars for years and a fuel injected motor will out perform a carb motor 98% of the time

What you automotive guys need to learn, is that Marine engines run and act in a different way than a car engine, or a race engine.

Not really sure why you even asked the question, if you are so set on using the EFI system, then go for it. It's obvious you don't want others opinions on sticking with the carb.

 

[badbowtie]

Re: 85 mercruiser 260hp

I didn't bring the gm cars up.
I am just asking for advice other than people saying cost and stay carb, pros and cons of efi and carb. I know carbs have been around for 100 + years but I am still looking for reasons other than cost. I know if I stay carb I would need to sell my 1410 and get a 1409 but looking into other options.

 

[dn010]

Re: 85 mercruiser 260hp

Tune up the engine, check the distributor for wear, check timing and test vacuum. There may be issues that will be present no matter what kind of fuel system you have.

 

[Bondo]

Re: 85 mercruiser 260hp

Hey, it's your money...

Ayuh,... My thought, exactly...

It's your money, throw it anyway, anyway you want...

 

[badbowtie]

Re: 85 mercruiser 260hp

Okay well after some more reading and advice given on here I am going to sell my 750 and get a 600 or find someone that will trade. I have also done some other reading what is the thought on using vortec heads and I no switch intake mainfold also.

 

[Bondo]

Re: 85 mercruiser 260hp

what is the thought on using vortec heads

Ayuh,... They're the Best heads ever put on a SBC, for a boat....

Figure about a 20hp improvement...

 

[badbowtie]

Re: 85 mercruiser 260hp

That is what I have read so I am going to probaly look for a set after I do a leak down test to make sure my motor is still good.

 

[badbowtie]

Re: 85 mercruiser 260hp

I have tried to look for the last couple days and have not seen any but can someone give me a idea what they have bought or seen the used 1410's sell for on ebay so I can sell mine someone local is asking about buying it.

 

[Bigdave196]

Re: 85 mercruiser 260hp

Just my.02, but first off the 750cfm carb is too big for your set up. Unless your over 400HP or turning over 5500 RPMs you have no need for a 750 on your SBC powered "money-pit". Second, you might need to overhaul your carb if you are starting to have dead spots in power. I run a 21' open bow, 350 HP SBC (rebuilt from 260) with an Alpha 1 Gen 2 outdrive and a 3-blade Stainless steel 19* Prop. Heads are stock, just higher comp ratio and different cam thru a factory mercruiser intake and Edelbrok Marine 1409 carb. It runs at about 55-60 on Lake Powell depending on fuel, and people on board at WOT.

Vortec heads are worth the money as long as you are still within your recomended power settings, but if your going to tear down the motor to replace the heads you might as well pony up for an aluminum dual plane high-rise intake. $150. It will help out on your bottom end throttle responce, lose 30-40 pounds off the weight of the motor, and why not....

 

[badbowtie]

Re: 85 mercruiser 260hp

I already posted that I am getting rid of the 750 and getting a 600 but it you are truly running 350hp you are pushing the alpha drive. I am going to do a leak down test and make sure the bottom end is solid only 5 years old but want to check it and will be going with a comp 270 cam and vortec heads and will have to replace my intake for the heads anyway.

 

[Bigdave196]

Re: 85 mercruiser 260hp

I know I am pushing my Alpha Drive, its rated for 300hp, and I am also up at 4500' above sea level. Rule of thumb is a 10%hp loss every 1000' above 2000' in elevation because of air density. When I go to Powell or down to St. George (Sand Hollow or Quail Res.) my boat comes alive. As long as you dont WOT it out of the hole and have a major load behind you on a tube or a pair of skiers it should be fine. I havent had an issue with it yet, and no metal in the gear lube for 2 summers.

Sounds like you got a saturdays worth of work lined up, lets see some pictures and good luck with you on that swap.