"I did a bit of research into wether or not the 4a-ge in tank fuel pump would deliver enough fuel pressure to the 3s-gte, most people have carried out this swap on superchargers which have a higher fuel pressure pump than the NA and I've been told they haven't had any problems. However there was no definite yes or no as to the NA pump being up to the job, for those who haven't changed a MK1 fuel pump let me just say it's a pig of a job, basically the whole tank has to come off to get at it and the tank has more pipes going to it than Middlesborough! So with already having a turbo fuel pump spare I decided to fit it anyway to be on the safe side.
Here's the two fuel pump carriers, the 4a-ge carrier is on the left, the turbo on the right, the inlet and outlet pipes are a different length and also the turbo carrier is about an inch taller than the 4a-ge, however both pumps are identical to look at sharing the same wiring and plumbing connections. You could get away with just fitting the turbo carrier without swapping pumps as it bolts on in the same place but the pipes do need altering. Here you can see the turbo pump fitted to the 4a-ge carrier on the left. I happened to have a spare 4a-ge carrier so I fitted it to this ready for the tank coming off. The tank will be removed as soon as the engine comes back out as there is lots of pipes to disconnect in the bay. "
ive also heard theres a supra item that is the same deal as the 3sgte one - id say that'd be that 7mgte pump youve mentioned? same process involved fitting it as described here i believe. pig of a job yes but if i ever had my engine out id rather want to do it then than later.. and toyo may be mega buck but thats partly why yours is still going after 17 years? just a thought
Sun, 20 March 2005 14:13
