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| Preparing my Fiero for an engine swap (Page 6/23) |
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longjonsilver
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NOV 10, 01:24 PM
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| quote | Originally posted by fieroguru:
About 6 1/2 years ago, I made an air cylinder rig and measured caliper line pressures (front & rear) at various pedal forces with both the stock booster as well as the S10.
Here are a couple of the tables. There are more here: http://www.fiero.nl/cgi-bin...1747&style=printable
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Thank you for providing specific information for us on braking force. Your setup looks real nice. Lots of thot went into your test. Thanks again
| quote | Originally posted by Patrick:
Just curious... why do you prefer that new location as opposed to under the spare tire? |
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The right front is the lightest wheel on a Fiero, especially driving solo. Also the weight of the battery is 2 ft farther forward, and altho it makes for a more polar moment of inertia, it also puts more downforce on the front of the car. My car as originally built was not safe at any speed over 55mph due to the parachute effect of the radiator housing, the lifting force under the bumperpad facia and the weight in the front of the car. i added tire chains to help it way back in 1985 and left them there till last week. That helped. Moving the battery on top of the tire helped a lot more. i don't know what has the greater change the GT facia from the bumperpad or the cutting of the radiator vent, cause i did them the same winter, but that really gave me some downthrust at high speed. i suspect that the weight of the battery, 33.6 lbs moved 2 feet will offset the loss of 9.6 lbs of chain minus the weight of the battery box 3.8 lbs. So lets see
33.6 lbs + 3.8 lbs * 10 ft compared to 33.6 lbs + 9.6 lbs * 8 ft
37.4 lbs * 10 ft compared to 43.2 lbs * 8 ft
374 ft lbs compared to 345.6 ft lbs. sooooooooooooo
374/345 = 1.08
or the new battery postition gives me 8% more tork on the front wheels, than the previous arrangement and 6 total lbs less.
jon
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Astronomy says we will find a coded signal from outer space. Then we'll KNOW that life exists there, for coded signals aren't by chance.
Biology says there are coded genetic signals in every cell, but we KNOW that no intelligence created life.
I'm the original owner of a white ' 84 2M4 purchased Dec 10, 1983 from Pontiac. Always garaged, no rust, 4-wheel drifts are fun!
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longjonsilver
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NOV 14, 06:37 AM
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i considered a lot of options to build my battery box, but finally settled on using easily welded material. Because this material is too thick to use on all four sides, i chose to make a lattice to keep the weight down. Here it is:
The back was left in two sections to allow the box to be squeezed to fit thru the bolts that hold the bottom of the headlight mechanism, as i didn't want to cut these bolts, so the drivers side bolt was missed by cutting the flange back and the passenger side bolt is missed by squeezing the box. i decided to use this portion to attach my horn using the two holes in the "handle" of the horn, like this:
It will not be easy to reattach these two bolts for the horn in the car, but i must be done. honk honk . Note the bolts in the bottom of the box. The little ones will attach to the facia to support it, and the large one will have the manditory rubber washer to fix the battery. There is piece of metal welded on the backside of the battery to attach it. Here is a shot of the battery in the box:
Well, actually two
jon
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Astronomy says we will find a coded signal from outer space. Then we'll KNOW that life exists there, for coded signals aren't by chance.
Biology says there are coded genetic signals in every cell, but we KNOW that no intelligence created life.
I'm the original owner of a white ' 84 2M4 purchased Dec 10, 1983 from Pontiac. Always garaged, no rust, 4-wheel drifts are fun!
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Patrick
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NOV 14, 03:48 PM
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| quote | Originally posted by longjonsilver:
My car as originally built was not safe at any speed over 55mph...
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Adding vents (either in the hood or in the front wheel wells) to allow trapped air out from behind the radiator, is probably the best thing to do to help keep the front end down at high speed.
Moving the battery up front from the engine bay is also definitely worthwhile doing, although a more central location (ie under the spare tire) I still believe is preferable for overall handling, as opposed to being relocated to a front corner of the car. However, I admire your ingenuity.
By the way, what's all that white stuff in a couple of your photos?  [This message has been edited by Patrick (edited 11-14-2018).]
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longjonsilver
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NOV 14, 04:34 PM
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Does my vent look fake?
jon------------------
Astronomy says we will find a coded signal from outer space. Then we'll KNOW that life exists there, for coded signals aren't by chance.
Biology says there are coded genetic signals in every cell, but we KNOW that no intelligence created life.
I'm the original owner of a white ' 84 2M4 purchased Dec 10, 1983 from Pontiac. Always garaged, no rust, 4-wheel drifts are fun!
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Patrick
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NOV 14, 05:13 PM
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| quote | Originally posted by longjonsilver:
Does my vent look fake?
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No more so than the other one.
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longjonsilver
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NOV 14, 06:40 PM
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and
The proof is in the pudding. (And you are "privileged" to see the dirty inside of my engine compartment. This is because my engine uses oil and a fair amount goes out the EGR tube into the engine compartment. That is why i call this thread "Preparing Freya for an engine swap" or something like that. My engine is on its last laps
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Astronomy says we will find a coded signal from outer space. Then we'll KNOW that life exists there, for coded signals aren't by chance.
Biology says there are coded genetic signals in every cell, but we KNOW that no intelligence created life.
I'm the original owner of a white ' 84 2M4 purchased Dec 10, 1983 from Pontiac. Always garaged, no rust, 4-wheel drifts are fun![This message has been edited by longjonsilver (edited 04-05-2020).]
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Patrick
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NOV 14, 07:26 PM
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| quote | Originally posted by longjonsilver:
The proof is in the pudding...
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I hope you don't think I required proof. I never doubted the vents were functional.
| quote | Originally posted by longjonsilver:
This rear vent is a front scoop from an 80's (?) Mustang. i hate how Mustang makes all these fake scoops. This one looked like it was functional but there was no hole in the hood other than the ones for the bolts, which i used to mount it to the 84. It is functional now heh heh.
The front vent that i made really helps keep the front down at speed... allows me to drive 80mph before the front gets squirrly.
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longjonsilver
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NOV 14, 07:35 PM
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| quote | Originally posted by Patrick:
I hope you don't think I required proof. I never doubted the vents were functional.
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i would like to think that i am a handling connoisseur. i realize that the battery under the headlight makes for greater polar moment, but i think that i still neeeeeeeeeed more downforce at speed. i have toyed over the years of making a front scoop, a splitter and the usual chin spoiler. dunno. Other projects take precedence.
jon
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Astronomy says we will find a coded signal from outer space. Then we'll KNOW that life exists there, for coded signals aren't by chance.
Biology says there are coded genetic signals in every cell, but we KNOW that no intelligence created life.
I'm the original owner of a white ' 84 2M4 purchased Dec 10, 1983 from Pontiac. Always garaged, no rust, 4-wheel drifts are fun!
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Patrick
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NOV 14, 07:45 PM
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| quote | Originally posted by longjonsilver:
i think that i still neeeeeeeeeed more downforce at speed.
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IMO, lowering your '84 would negate most/all of that need.
I haven't gone crazy speeds... but at 100+ MPH, both my '88 Formula and my '84 duke (takes a little longer to get there) feel quite planted. Both cars are lowered and have aftermarket struts/shocks, and both use a vented hood. The Formula has its battery up front in the spare tire tub, while the '84 still has its battery in the engine bay.[This message has been edited by Patrick (edited 11-14-2018).]
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longjonsilver
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NOV 14, 08:06 PM
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| quote | Originally posted by Patrick:
IMO, lowering your '84 would negate most/all of that need.
I haven't gone crazy speeds... but at 100+ MPH, both my '88 Formula and my '84 duke (takes a little longer to get there) feel quite planted. |
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i have considered lowering my car. i was close to doing it when i did all my ball joints, tie rod ends and bushings in both the front and rear of the car, but i guess i am too cheap to pay for springs and altho i can cut my springs with my chop saw, they are already the stiffest springs that Pontiac put in a Fiero, and i don't want my suspension to bounce. Real roads are not tracks, real roads, especially here in Montreal, have bumps. Bumps are not friendly to low pro tires or stiff springs, altho my springs seem to be OK, but notice i don't have low pro tires by todays standards. Speaking of lowering, look how high the rear end of Freya sits.
jon
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Astronomy says we will find a coded signal from outer space. Then we'll KNOW that life exists there, for coded signals aren't by chance.
Biology says there are coded genetic signals in every cell, but we KNOW that no intelligence created life.
I'm the original owner of a white ' 84 2M4 purchased Dec 10, 1983 from Pontiac. Always garaged, no rust, 4-wheel drifts are fun![This message has been edited by longjonsilver (edited 04-05-2020).]
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