Engine help...

[Shaun 'TheSheep' Atkinson]

Having never run 1/8th and giving it a go this year, just wondered if someone could answer a little question for me!

What is the difference between a 5+2 port engine, like this one:
http://www.m-k-racing.com/product_info.php?products_id=7464

And a 7 port engine, like this one:
http://www.m-k-racing.com/product_info.php?products_id=7315

I don't want to know what the differences are between those 2 engines, i want to know what the difference is between a 5+2 port and a 7 port? Surely a 5+2 = 7 Port doesn't it? Or am i just being stupid lol

Cheers guys.

[spud31]

Hi

Normally 5 + 2 = 5 ports plus 2 transfer ports.

[Shaun 'TheSheep' Atkinson]

I'd kinda guessed that much from what i've read, but what are the pro's and con's? what is the technical differences between each one?

[jamiekerr14]

7 Port will have more top end-but a slower bottom ect..
and the 5+2 Will have a good bottom and top
3 Port is more suited to small track's It will have a very perky bottom but not much top

This is generally the rule of thumb...

[Shaun 'TheSheep' Atkinson]

So in theory then, the 5+2 is a good all-rounder for someone doing there first year in 1/8th :)

[Chris Doughty]

for your first year in 8th scale, I wouldn't worry about the internal make-up of the engine, I would go with the recomendation of someone you trust for engine brand and model.

so for example if someone I trusted said to me get a BrandX XX.21 engine, I'd get it no matter how many ports it had.

also if this same person will be racing with you regularly and has the same engine, having them there to help tune it will be worth WAY more than the 'right' number of ports.

8th scale is an Endurance sport. never forget that. reliability is key

I have no idea how many ports my engine has, but I do know what plug to use in it, what tune to run, how many minutes I can get on a tank and that its bloody rapid.