2008/9 IQR...What engine work is needed to make it a decent mountain engine?

[mountainhorse]

I hope you guys can take a few minutes to help me out with some info.

I'm thinking of building a fun little 600 mid-length spring-boondocking/hucker sled...136" to 141"... I have a long track sled for other days.

Looking at the 2008/9 IQR 600 and wanted to find out what would need to be done to the engine to make it a mountain compatible engine.

I already have the chassis components lined up & on hand (front suspension, skis, shocks, tunnel, cooler, skid, track, driveshaft, seat cover, tank, handlebars/riser etc...)

I understand that the cluching needs to be done.

What is the differnce between a 2008 and a 2009 IQR... looks like the front suspension went to Holz in 2009... anything else.

I want to keep the bore STOCK on this (no big bore or bolt on 800CFi cyls)

Has anyone used any of the Altitude compensation systems on this motor in a high altitude situation (6-10,000 ft)

Pre-mix is OK for me.

Up to 30% Race mix is ok for me but I dont want to run full race gas unless it will make a big difference in how she runs.

What is the compression ratio in the 600 race?

Can I run the stock IQR pipe or is the powerband on that one not that great for mtn use?
Does anyone make a lightweight can for the 2008/09 IQ Racer that is NOT a stinger and uses the stock IQR pipe?
I'm looking for a something that is not so loud.

SLP says that their pipe would need to be modified to fit the 600 Race chassis... what would need to be done?
http://www.startinglineproducts.com/catalog.cfm?pageID=detail&catalogID=3&catID=19&productID=847

 

[Irace]

I see you want stock bore but:
Carls 660 is the way to go

 

[IQRIDR]

I'm gonna have to agree. My 660 took a lot of abuse and made many a 700 or 800 struggle to keep up. Very durable and lasting big bore.

 

[autolodge]

09 600r

You can run the 09 600R motor on 92 octane VERY safely at altitude. Just for some reference, I ran a WELL tuned Carls 660ves in an IQr chassis last year. My buddy had a 09 IQr 600 stocker that would trade pulls with me in a drag race. Strongest "pump gas" 600 I have seen to date. There is a noticeable difference in power (like sled lengths) between the 600 long stroke (08 and 09 race motor) and the 600HO. I would compare it to the difference between the 600HO and the 660HO. At sea level I was running a 600HO with a Dynoport pipe in my IQr and pulling an EPI gold with 10-62s to 8100. His 09 IQr600 was pulling an EPI gold with 10-64 bellybusters to 8300 no problem. That is a considerable power difference. My 660VES was running the same (gold/64g weight) clutching. Hope this makes sense, Craig

 

[Clarke673]

Just go EFI 800 now, you will thank me later. With the cost of a 660 kit you could buy a new 800 and sell your engine to pay for the pipes, high comp head, boyseen reeds, custom air box, and a good team clutch. Then after a year or two when sleding becomes against the law, and you need a turbo to get you away from the pine pigs, you are ready to go!

Thats what i am planning on doing....anyone want a 800 BOC VES kit for an IQR? $2500 with twin pipes, clutches, airbox,compleate wire harness, ETC. Even throw in a short warrantee.