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Good excuse to tune the engine has arrived!! Help

Here’s where to discuss anything specific about your standard(ish) car or something that applies to the model in general.
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Orophin
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Good excuse to tune the engine has arrived!! Help

Postby Orophin » 01 May 2008 17:05

Upon completion of my mechanics task of redoing the head gasket and for a bill much lower than i imagined...it has come to our attention that the no1 cylinder piston has warped. The head has been skimmed and it's fine.

I find myself now in a situation saying I may as well do some engine tuning mods while the head off ect...

I will need some new pistons yes? Now i'm saying...can I bore the cylinders out anymore? That may be more cost effective than say v8ing it or even putting a 16v conversion because I've had the head skimmed already and i'll need other stuff like a dizzy and custom exhaust manifold. What do you think?

I'm already going to install a sports exhaust/4 branch manifold plus a high lift cam and kn filters and richer carb needles. Can you bore these engines out any more and what are the biggest pistons you can get???

Please give me some advice, I want this car good and th summers nearly here!

Beans
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Postby Beans » 01 May 2008 17:57

<blockquote id="quote"><font size="1" face="Century Gothic, Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Orophin</i>

...what are the biggest pistons you can get???...<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">
Original the pistons were available as standard size (90.3 mm) and one oversize (+0.020").
Nowadays there are larger oversized pistons available, check with the usual suppliers. I know Robsport do +0.030" pistons

<center>Image
<font color="blue"><i>1981 TR7 FHC Sprint (better known as 't Kreng)
1981 TR7 DHC (not very well known yet, but back on the road)
Also a 1980 TR7 DHC, 1980 TR7 DHC FI, 1981 TR7 FHC
http://tr7beans.blogspot.com/</i></font id="blue"></center>

Orophin
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Postby Orophin » 01 May 2008 20:04

S+S do +0.040" same price as normal size pistons. Is that the biggest? And how cost effective is this for the amount of power upgrade? How also do you work out the new displacement cubic capacity? Thanks.

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