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Underbody braces, turbos and more!

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PostPosted: Sun Nov 02, 2008 10:34 am 
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Joined: Sun Nov 02, 2008 9:54 am
Posts: 82
Location: Heart of the Trent, Ontario
Hi All,
I'm new to the board. For the longest time I was sacrificing fuel economy for power..but no more! Behold the '91 Firefly convertible LE(same as Metro) I picked up for the wife's commute for a mere 600 dollars! 170k kms & never winter driven.

This will be her "limited edition" Firefly XFI , I want to do the XFI cam swap that MetroMPG did, advance the timing by doing the sprocket mod, and switch to a different transmission with lower final drive. Not going to mess with the computers or remove any piston rings. I'm thinking a transmission off of a per 95 Metro/swift/firefly with 1.3L SOHC motor would do this trick with its 3.52 final drive? I think these convertible's have a much higher final its gotta go! Any idea where I could source a transmission or XFI Cam? So far..I've checked out and sent a few emails to DeltaCam and 3 Tech who both have cams in stock. Ideally I'd like an OEM cam..

So far, I've got a fresh timing belt, wires, dist cap, rotor button, accessory belt to put on it once I get that XFI Cam. I've also just put a new set of nordic winter 13" tires, they're 185 tall so the speedo reads 100kph when she's actually going 110! I know they aren't low rolling resistance, but she drives a pretty sketchy part of the 401 hwy everyday, averaging 200kms/day out of a 5 day week back and for to university. On top of that, she has shifts at the hospital most times on weekends so she's putting 1000-1200kms on the car/ is a priority right now....

So I figure, with the taller tires, Cam swap, advanced timing and much lower final drive tranny..she should be getting some much improved Mpg!? Looking forward to your suggestions


Lisha's Convertible1.jpg
Lisha's Convertible1.jpg [ 129.22 KIB | Viewed 619 times ]
LIsha's convertible3.JPG
LIsha's convertible3.JPG [ 120.58 KIB | Viewed 619 times ]

-Save the Trees, Eat a Beaver!-

91' Firefly Turbo Convertible -> '90 G10T Swap, +6 Timing Sprocket, Stock Turbo, intercooler & 198/330 Cam, NGK V-power's, 7mm wires, Boost Gauge, Manual Boost Controller set to 9psi, Mobil 1 & GM Synchromesh, Short Shifter, K&N + removed resonator, Gutted Pre-cat, 2" Exhaust, High Flow Cat & Muffler, Front sway bar, Front underbody Brace, 185/65R14's on Steelies..
PostPosted: Sun Nov 02, 2008 3:53 pm 

Joined: Fri Nov 09, 2007 5:46 pm
Posts: 1099
Location: Abbotsford, BC
is nice !! :razz:

1995 Firefly 1.3 SOHC 8VALVE MANUAL
2000 Firefly 1.3 SOHC 16VALVE AUTO. Goals: full restoration, achieve stock MPG and HP or higher, finished look should be 'stealthy' and unassuming. Engine will need to be rebuilt later on to restore compression levels.

PostPosted: Tue Nov 04, 2008 7:27 am 
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Joined: Tue Mar 16, 2004 6:23 am
Posts: 1750
Location: Washington, DC
With the taller tires on 13" wheels you're already near XFI gearing. Changing from 4.39 to 3.52 would be a HUGE difference. Try starting off in second gear for a while to see if it would be a good idea, I think it would be too much. Base models were 4.10 and XFI's 3.79 (with the much smaller 12" wheels) if you want something less drastic.

91 Pontiac Firefly Turbo
10 Suzuki Kizashi

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