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Old 04-23-2007 | 08:53 AM
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afiq
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Joined: Jul 2005
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Originally Posted by Sp Racer
Hi Guys

I have just swapped over from Sirio STI to the LRP spec 3 -

Ran my first meeting with it last weekend and so far so good, the Sirio was a screamer but the LRP seems to scream just as loud ! ( I am using the 2611 Sirio pipe BTW)

I had a couple of little problems though, In the final, as the engine got warmer, I started to get a "lean bog" out of the corners, even though I started a bit on the rich side.....anyone else have this ? - I ended up having to pit and richen the top end out a half a turn....maybe because the engine is still a little tight?

A couple of other things...

I had to modify the carb clamp, as it wouldn't tighten up enough , the holes on the side of the block are like 0.5mm too small, I couldn't get the bolts to line up on the one piece engine mount in my RRR.

The main (top end) needle seems very loose?

Which springs is everyone using to hold the exhaust header on?

Does anyone make proper header gaskets that allow the small exhaust port engines like the LRP to use the headers with the bigger holes?

regards

Luis Sola

Australia
Hi Luis!

I meet u in sarawak Malaysia 2004 anttending Asean cup race.Very happy to hear u using LRP engine.The spec 3 tunning u have to monitor on the low end needle first.Start the engine,make it idle about 20 sec and punch full throttle.If the engine stall than lean it,u do this until u have good throttle punch but not lean until your low end BOG.Second step on the high end needle u tune it neautral on the starter box and u fine tune it on the track ( to be safe).When u already reach the tunning on the straight check the temperature should be around 110celcius max 115celcius.If u use 16% fuel please check your headshims.In malaysia wheather we run 16% fuel with headshim 0.4 to 0.45 and the temp 115c works better.Hope this explaination will help u.Feel free to email me at [email protected]k u for using LRP PRODUCTS.
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