14 replies to this topic

[minimissionary]

I have the opportunity to have my standard Spi cylinder head modified for a very reasonable price, but have read that the standard heads aren't worth bothering with. Will it make any difference at all?
Can't afford the price of a big valve head. Not looking for a monster increase, just like the idea of a bit more 'Go' for a good price.
Will probs pair it up with a Stage 1 kit at some point.

Cheers much.

[cliche]

are you my twin ?
Same route I am going after a LOT of research

http://www.theminifo...01070-required/

[minimissionary]

Read your's just after posting this.

Wish I could afford a cam to go with it I'm just using what I've got as best I can (most student-ey of student budgets).
By the way, where in Manchester are you? I'm at Salford Uni. Maybe you've seen a Taihti Blue Mayfair with white steelies flying around?

[cliche]

ah - I live in Eccles, Salford - just down the road from you !

Well, the reason why I can afford it (just) is that I've been working overtime since last July to get the money to get my 94 Spi back on the road. I can't really afford the cam, but am stretching it as to change it later will mean taking the box and engine out again and I won't have the cash at all then.

I'm no expert but what I've been reading on here and in Keith Calver's articles (search for Calver's Corner on web) and a LOT of Sprocket's posts across the web (not just on TMF) is to go with a modded airbox first (not the cone) with a drop in K&N, with an RC40 twin box side exit (as per Calver and TMF postings). I'm going for a Maniflow as they seem to sound better and are better built.



THEN, go with the head. I'm sure other, more experienced TMF'ers will give more advice or correct me if need be. Like I say, I'm starting mine on Monday so am just collating info I have spent all my spare time reading and checking !

oh and will keep an eye out for you once mine is on the road and I finish my overtime !

Edited by cliche, 24 February 2012 - 12:19 AM.

[Sam Walters]

spi head is the same as any big bore head for modifying....

its the standard 998 small bores that arnt worth it.

[minimissionary]

ah - I live in Eccles, Salford - just down the road from you !

Well, the reason why I can afford it (just) is that I've been working overtime since last July to get the money to get my 94 Spi back on the road. I can't really afford the cam, but am stretching it as to change it later will mean taking the box and engine out again and I won't have the cash at all then.

I'm no expert but what I've been reading on here and in Keith Calver's articles (search for Calver's Corner on web) and a LOT of Sprocket's posts across the web (not just on TMF) is to go with a modded airbox first (not the cone) with a drop in K&N, with an RC40 twin box side exit (as per Calver and TMF postings). I'm going for a Maniflow as they seem to sound better and are better built.



THEN, go with the head. I'm sure other, more experienced TMF'ers will give more advice or correct me if need be. Like I say, I'm starting mine on Monday so am just collating info I have spent all my spare time reading and checking !

oh and will keep an eye out for you once mine is on the road and I finish my overtime !

The modded air box thing gets me. Do you mean this? http://www.cloud-nin...ech_airbox.htm#
The guy cuts off half the things that support the air box on the injector. Bet it rattles much.

I'm only going with the modified head because I can get it done for next to nothing. Seems logical Then it's onto letting it exhale a little better with some exhaust mods.

By the way, if you fancy a hand with anything during term time, let me know. Just tackled a head gasket, so now I know everything

[cliche]

nope more like this

http://www.calverst....est,%20pic2.jpg

from this article http://www.calverst....filter_test.htm


Thanks for the offer of help, might take you up on that !
Who is doing your head modding cheap by the way ?.


Oh and get some security like a disklock or wheel clamp. There are thieving gits galore in Salford - I'm keeping mine garaged

Edited by cliche, 24 February 2012 - 12:58 AM.

[minimissionary]

How does that work out on the injection box? Just drill on the outer parts of the air filter?

I've got a secure car park at my digs. 24hr security. Still.....

[cliche]

How does that work out on the injection box? Just drill on the outer parts of the air filter?

I've got a secure car park at my digs. 24hr security. Still.....

yeah there is a TMF thread on here with better pics but I'm damned if I can find it

Edited by cliche, 24 February 2012 - 01:31 AM.

[minimissionary]

Same. I have looked. Bloody search function!

[cliche]

Well I know I saved the pic on my hard drive, so I've uploaded it here, even if I can't find the thread.







Better than words !
Even Minispares stage 1 kit consists of a drop in k&n

Edited by cliche, 24 February 2012 - 01:36 AM.

[cliche]

oh and here's a thread, not THE thread

http://www.theminifo...__1#entry509871

[minimissionary]

Ah thanks Just thought it might be different on an injection box, but I guess the principle is the same. I've got K&N in there, first thing I did.
Need more cheap power!

[cliche]

no worries ! Can't get cheaper than the above (ok, maybe going downhill is cheaper)

[minimissionary]

no worries ! Can't get cheaper than the above (ok, maybe going downhill is cheaper)

On a windy day.