Search found 2895 matches

by jondee86
Fri Oct 01, 2021 3:05 pm
Forum: TECH: 4A-GE ENGINE
Topic: TVIS inlet
Replies: 54
Views: 30707

Re: TVIS inlet

There was a time when engines didn't need trick intake manifolds to make torque... http://www.vanpeltsales.com/FH_web/FH_images/FH_engine-pics/Flathead_enginecurves_1939-40_95hp.jpg And it was usable torque... there at low rpm so you didn't have to abuse the clutch and rev the snot out of the engine...
by jondee86
Fri Oct 01, 2021 2:21 am
Forum: TECH: 4A-GE ENGINE
Topic: TVIS inlet
Replies: 54
Views: 30707

Re: TVIS inlet

Here is a screenshot grabbed from this video... https://www.youtube.com/watch?v=TtX4ocZRITo https://i.imgur.com/4mavjtw.png This is from a mildly modified bigport running smallport 10.3:1 pistons. As can be seen from the graph the difference in bottom end between TVIS ON and TVIS OFF is minimal. I h...
by jondee86
Wed Sep 29, 2021 10:42 pm
Forum: TECH: 4A-GE ENGINE
Topic: TVIS inlet
Replies: 54
Views: 30707

Re: TVIS inlet

While I don't have any specific information relating to the reasons for using the TVIS system on the 4A-GE, these figures pulled from Wikipedia are interesting... 16V 4A-GEU 81 x 77 bore x stroke 112hp @ 6600rpm, 97lb.ft @ 4800rpm 8V 2T-GEU 85 x 70 bore x stroke 115hp @ 6000rpm, 108lb.ft @ 4800rpm h...
by jondee86
Wed Sep 29, 2021 7:46 pm
Forum: TECH: 4A-GE ENGINE
Topic: TVIS inlet
Replies: 54
Views: 30707

Re: TVIS inlet

Lots of ideas and lots of work with an unknown result :) Looking at this pic of an bigport-smallport adapter plate, I think it is an easy, totally reversible solution that is well work a try before looking at the more extreme options. https://i.imgur.com/5JXEvgh.jpg Having the airflow going from the...
by jondee86
Tue Sep 28, 2021 2:50 pm
Forum: TECH: 4A-GE ENGINE
Topic: TVIS inlet
Replies: 54
Views: 30707

Re: TVIS inlet

If you are feeling adventurous, read this... https://sv3power.com/_page_id=324/ You are doing the opposite to this guy but you could look at doing something along the same lines. If you are not fussed about retaining the TVIS you could gut the plate and make your own adapter plate. Easy enough to ad...
by jondee86
Tue Sep 28, 2021 2:55 am
Forum: TECH: 4A-GE ENGINE
Topic: TVIS inlet
Replies: 54
Views: 30707

Re: TVIS inlet

This ^^^^. I know it is fashionable to dismiss the information posted by Billzilla as being out of date, but I happen to think that he did know what he was talking about when it came to generalising the upgrade path for the 4AGE. And as I recall (correct me if I am wrong) he stated that while the sm...
by jondee86
Sun Sep 26, 2021 6:08 pm
Forum: OWNERS and BUILDERS
Topic: Mi Toyoda Corolla
Replies: 3
Views: 6380

Re: Mi Toyoda Corolla

https://i.imgur.com/CDJg9Lk.jpg https://i.imgur.com/CDJg9Lk.jpg <=== this is the image link without the IMG tags. Click on this and it will take you to the image hosting service (IMGUR) that I use. Because this image that I copied from an Ebay listing was too big for Club4ag to handle, I had to cop...
by jondee86
Fri Sep 24, 2021 11:38 pm
Forum: OWNERS and BUILDERS
Topic: Mi Toyoda Corolla
Replies: 3
Views: 6380

Re: Mi Toyoda Corolla

Hola Felix... put the original link back up... the one that showed a pic when you clicked on it.
Put up a couple more links if you have some at the same time. So long as they bring up a pic
when you click on them I should be able to get them working for you.

Cheers... jondee86
by jondee86
Sun Sep 19, 2021 3:33 am
Forum: TECH: 4A-GE ENGINE
Topic: TVIS inlet
Replies: 54
Views: 30707

Re: TVIS inlet

What OST has done with his inlet would be ideal for my application but I'd need to graft a TVIS top on. That would seem to be the ideal solution providing (a) the scrutineers don't know/care how many intake runners the TVIS manifold should have, and (b) that they will not be looking for a TVIS plat...
by jondee86
Sat Sep 18, 2021 6:11 pm
Forum: TECH: 4A-GE ENGINE
Topic: TVIS inlet
Replies: 54
Views: 30707

Re: TVIS inlet

@ OST When I made my manifold I went to the trouble of sloping the throttlebody downwards to match the slope on the factory RWD manifold as it was going into an AE86. I did that in case there was a clearance issue with the closed hood if the throttlebody was installed level. Second reason was that I...
by jondee86
Sat Sep 18, 2021 3:52 pm
Forum: TECH: 4A-GE ENGINE
Topic: TVIS inlet
Replies: 54
Views: 30707

Re: TVIS inlet

What about a cut-n-shut smallport manifold ? Factory manifold modified to RWD...

Image

Cheers... jondee86
by jondee86
Sat Sep 18, 2021 3:18 am
Forum: TECH: 4A-GE ENGINE
Topic: TVIS inlet
Replies: 54
Views: 30707

Re: TVIS inlet

Here are the TRD GroupA 4AGE specs from back in the 80's. They were making around 170hp at the crank back then with a whole bunch of closely controlled parts and camshafts limited to 7.5mm lift. They had to use the factory intake manifold and probably the TVIS plate, but I can't be sure of that. htt...
by jondee86
Thu Sep 09, 2021 9:58 pm
Forum: OWNERS and BUILDERS
Topic: Mi Toyoda Corolla
Replies: 3
Views: 6380

Re: Mi Toyoda Corolla

Hey Felix... you can't post pics directly to this site. You have to get your pics uploaded to an image hosting site and then copy and paste the image links here. The links will look something like this... [img]h*ttps://i.imgur.com/tFbUiFZ.jpg[/img] but without the asterisk (*) in https that I used s...
by jondee86
Fri Aug 20, 2021 4:03 pm
Forum: TECH: 4A-GE ENGINE
Topic: High C/R & Fuel Octane...
Replies: 6
Views: 5326

Re: High C/R & Fuel Octane...

Volumetric Efficiency (VE) is a measure of how efficient your engine is at drawing air in to the cylinders on the intake stroke. If the volume of air drawn in on each intake stroke is equal to the calculated swept volume of the cylinder, the VE is 100%. However, as the intake system will have some ...
by jondee86
Fri Aug 20, 2021 2:09 am
Forum: TECH: 4A-GE ENGINE
Topic: High C/R & Fuel Octane...
Replies: 6
Views: 5326

Re: High C/R & Fuel Octane...

The Toyota 86 (Scion) has a static compression ratio of 12.5:1 and runs on 98RON with a modern ECU with knock control. On this basis alone I would suggest that (if available) you run 93AKI. https://i.imgur.com/u0HPjQ5.png However, that is not the full story. To better estimate your octane requiremen...
by jondee86
Thu Aug 19, 2021 8:55 pm
Forum: TECH: 4A-GE ENGINE
Topic: High C/R & Fuel Octane...
Replies: 6
Views: 5326

Re: High C/R & Fuel Octane...

Good question, and there is an easy answer.... if you don't get any detonation under any load, rpm and temperature conditions, then you have enough octane. The chart below gives one generalised answer, but there are many factors involved and no-one can give you a specific answer to the question &quo...
by jondee86
Sat Aug 14, 2021 2:07 am
Forum: OWNERS and BUILDERS
Topic: "Kentucky AE86: A Levin Story"
Replies: 145
Views: 148739

Re: "Kentucky AE86: A Levin Story"

Nice to see that you are putting that car to good use :) No sense in putting money into improving the handling if you don't put it to the test. And autoX is a great place to learn where the limits are without being in danger of doing damage to yourself or your car. Too many people get into trouble o...
by jondee86
Fri Aug 13, 2021 4:19 pm
Forum: TECH: Corolla AE86
Topic: Update on AE86
Replies: 6
Views: 7160

Re: Update on AE86

Sounds good on the dyno... pulls nice and clean so your tuner is doing his job :) If
you have a copy of the dyno printout that you can post up, I'd be keen to see what
kind of results you are getting at this stage.

Have you been out driving the car yet ?

Cheers... jondee86
by jondee86
Tue Aug 10, 2021 10:57 pm
Forum: TECH: Corolla AE86
Topic: E10 pump fuel
Replies: 10
Views: 7521

Re: E10 pump fuel

Difficult to get any hard information as everyone (including me) makes their own best guess on the bad effects of E85. Ethanol is a good solvent and there is enough anecdotal evidence of its effect on old factory rubber hoses that I would replace them with E85 approved hoses. After thirty five years...
by jondee86
Mon Aug 09, 2021 9:06 pm
Forum: TECH: Corolla AE86
Topic: E10 pump fuel
Replies: 10
Views: 7521

Re: E10 pump fuel

Any idea if the standard rubber fuel lines in the rear of the car are E85 safe ? I'm guessing you are talking about an AE86 ? And you are using E85 because you will be boosting it ? If so, and knowing the quality of your previous builds, I would recommend replacing every wetted part from the gas ta...
by jondee86
Mon Aug 02, 2021 4:53 am
Forum: TECH: Corolla AE86
Topic: E10 pump fuel
Replies: 10
Views: 7521

Re: E10 pump fuel

I wonder how long is too long to leave E10 without using the car? I have seen a figure of 90 days quoted as the recommended maximum. However, I have also seen a recommendation that the tank be drained before the vehicle is put into storage. This is primarily aimed at avoiding old degraded gasoline ...
by jondee86
Sun Aug 01, 2021 8:49 pm
Forum: TECH: Corolla AE86
Topic: E10 pump fuel
Replies: 10
Views: 7521

Re: E10 pump fuel

We had 98 octane here in NZ for a while... it was an E10 blend. Discontinued now and replaced with straight 98 octane gasoline as the supply of ethanol dried up due to production being diverted to the manufacture of hand sterilizing products !!! The predominate issue with E10 is that ethanol is hygr...
by jondee86
Tue Jul 27, 2021 2:32 am
Forum: TECH: 4A-GE ENGINE
Topic: HIGH comp Big port carby build with MANY questions
Replies: 45
Views: 30537

Re: HIGH comp Big port carby build with MANY questions

Yes... I have been waiting for some further information. Apparently that blackened area is a problem. Without anything concrete to go on I'd guess that there is scaling or pitting there possibly caused by water sitting in that cylinder for a long time. The piston looks like it may have been "st...
by jondee86
Fri Jul 23, 2021 6:03 pm
Forum: TECH: 4A-GE ENGINE
Topic: HIGH comp Big port carby build with MANY questions
Replies: 45
Views: 30537

Re: HIGH comp Big port carby build with MANY questions

If you have the engine out of action for a while, drain the oil out of the pan and put it in a large container. Let it sit for a few days and any water mixed with the oil should separate out. Then very carefully and slowly decant the oil into a second container until there is just a small amount of ...
by jondee86
Fri Jul 23, 2021 3:12 am
Forum: TECH: 4A-GE ENGINE
Topic: HIGH comp Big port carby build with MANY questions
Replies: 45
Views: 30537

Re: HIGH comp Big port carby build with MANY questions

MLS head gaskets generally require a finer (smoother) surface finish than than OEM composite gaskets. If you are uncertain of the piston to head clearance, and the finish on the head and block is not specifically prepared for a MLS gasket , you would be better off installing a fresh OEM composite ga...
by jondee86
Thu Jul 22, 2021 3:35 pm
Forum: TECH: 4A-GE ENGINE
Topic: HIGH comp Big port carby build with MANY questions
Replies: 45
Views: 30537

Re: HIGH comp Big port carby build with MANY questions

If the engine is running fine/normally then the cylinder sealing is likely OK. The water leak is probably between the oil and water passages where they pass thru the head gasket... https://haynes.com/en-us/tips-tutorials/7-different-ways-head-gasket-can-fail Because the pressure differential is lowe...
by jondee86
Wed Jul 21, 2021 4:24 pm
Forum: TECH: 4A-GE ENGINE
Topic: HIGH comp Big port carby build with MANY questions
Replies: 45
Views: 30537

Re: HIGH comp Big port carby build with MANY questions

I'm curious as to why your temperature would go up to 90 and then drop quickly when you rev the engine. Do you have a thermostat installed ? Do you have an electric cooling fan ? If your radiator overflow hose went all the way to the bottom of your soda can, and you fill the radiator to the the top ...
by jondee86
Thu Jul 08, 2021 3:04 pm
Forum: TECH: 4A-GE ENGINE
Topic: Welded injector ports
Replies: 3
Views: 3485

Re: Welded injector ports

Image
by jondee86
Sun Jun 20, 2021 3:09 pm
Forum: TECH: 4A-GE ENGINE
Topic: Bigport, Weird engine sound
Replies: 8
Views: 7319

Re: Bigport, Weird engine sound

The "sound" is reported as being temperature dependent and also that it suddenly became more noticeable. This tends to point towards some operating condition of the engine having changed. Without being able to offer any scientific reason, when I have been fiddling with engines I have found...